chore: Store contributor avatars. (#353)

Closes #351.

.all-contributorsrc

@@ -17,7 +17,7 @@
     {
       "login": "vxern",
       "name": "Dorian Oszczęda",
-      "avatar_url": "https://avatars.githubusercontent.com/u/56321034?v=4",
+      "avatar_url": ".github/assets/profile-pictures/vxern.jpeg",
       "profile": "https://github.com/vxern",
       "contributions": [
         "maintenance",
@@ -31,7 +31,7 @@
       "login": "nemokosch",
       "name": "Nemokosch",
       "profile": "https://github.com/2colours",
-      "avatar_url": "https://cdn.discordapp.com/avatars/297037173541175296/ab9706731d68cd84dc69b6e9c27fcd9e",
+      "avatar_url": ".github/assets/profile-pictures/nemokosch.png",
       "contributions": [
         "infra",
         "userTesting",
@@ -43,7 +43,7 @@
       "login": "16wardm",
       "name": "Mattheos",
       "profile": "https://github.com/16wardm",
-      "avatar_url": "https://cdn.discordapp.com/avatars/758385691851096195/cd2229abe225053a7d67d96263d606d5",
+      "avatar_url": ".github/assets/profile-pictures/mattheos.png",
       "contributions": [
         "translation",
         "userTesting",
@@ -54,7 +54,7 @@
       "login": "ferb02",
       "name": "Victor",
       "profile": "https://youtube.com/channel/UC4aqpjKwQfkqxmQO0Owy2QQ",
-      "avatar_url": "https://cdn.discordapp.com/avatars/303605019532460033/d6df111ee944ac997cf16d4a743cf189",
+      "avatar_url": ".github/assets/profile-pictures/victor.png",
       "contributions": [
         "userTesting",
         "translation",
@@ -64,7 +64,7 @@
     {
       "login": "mymy",
       "name": "Mymy",
-      "avatar_url": "https://cdn.discordapp.com/avatars/859452448191545364/be65339a3e0021bc90211e0c4195fb7c",
+      "avatar_url": ".github/assets/profile-pictures/mymy.jpeg",
       "contributions": [
         "userTesting",
         "ideas"
@@ -73,7 +73,7 @@
     {
       "login": "bean__queen",
       "name": "Annie",
-      "avatar_url": "https://cdn.discordapp.com/avatars/1118870714771054592/51f2e92de9864ae8deeb2e5d6fdcf376",
+      "avatar_url": ".github/assets/profile-pictures/annie.png",
       "contributions": [
         "userTesting",
         "ideas"
@@ -82,15 +82,15 @@
     {
       "login": "at.peace",
       "name": "Alaska",
-      "avatar_url": "https://cdn.discordapp.com/avatars/797369145367855104/ac1fe2508cd6df347d801f4caf967a04",
+      "avatar_url": ".github/assets/profile-pictures/alaska.png",
       "contributions": [
         "translation"
       ]
     },
     {
       "login": "kamelNeoN",
       "name": "Kamel",
-      "avatar_url": "https://cdn.discordapp.com/avatars/311489852824616961/bd594c224c551a04fce50b7d5e408958",
+      "avatar_url": ".github/assets/profile-pictures/kamel.jpeg",
       "contributions": [
         "translation",
         "ideas"
@@ -99,7 +99,7 @@
     {
       "login": "vittorio3099",
       "name": "Paul",
-      "avatar_url": "https://cdn.discordapp.com/avatars/399515144482455553/d42543f2f90bbd8496c39903d1be3ed0",
+      "avatar_url": ".github/assets/profile-pictures/paul.png",
       "contributions": [
         "translation",
         "ideas"
@@ -109,47 +109,47 @@
       "login": "asterfields_",
       "name": "Asterfields",
       "profile": "https://x.com/_stechi_",
-      "avatar_url": "https://cdn.discordapp.com/avatars/839862207025119252/fd5f455be6c6f20a3cf0f1a860074397",
+      "avatar_url": ".github/assets/profile-pictures/asterfields.png",
       "contributions": [
         "translation"
       ]
     },
     {
       "login": "adeniial",
       "name": "aura",
-      "avatar_url": "https://cdn.discordapp.com/avatars/868631133263376424/9b2020c9effc7f60ab90e78f7e9cd71a",
+      "avatar_url": ".github/assets/profile-pictures/aura.png",
       "contributions": [
         "translation"
       ]
     },
     {
       "login": "eagely",
       "name": "eagely",
-      "avatar_url": "https://cdn.discordapp.com/avatars/415132870252822539/927bfd64aea0166fc9a44f0a7a3b2a70",
+      "avatar_url": ".github/assets/profile-pictures/eagely.png",
       "contributions": [
         "translation"
       ]
     },
     {
       "login": "estheroide",
       "name": "Esther",
-      "avatar_url": "https://cdn.discordapp.com/avatars/747900197358665758/b4f7ea590b477359c433dac9b629337b",
+      "avatar_url": ".github/assets/profile-pictures/esther.png",
       "contributions": [
         "translation"
       ]
     },
     {
       "login": "hani_men12",
       "name": "Haniel",
-      "avatar_url": "https://cdn.discordapp.com/avatars/775308215470391317/04dbc74b010d1a5736f5a8d911589f29",
+      "avatar_url": ".github/assets/profile-pictures/haniel.jpeg",
       "contributions": [
         "translation"
       ]
     },
     {
       "login": "iiv",
       "name": "iiv",
-      "avatar_url": "https://cdn.discordapp.com/avatars/99962686766333952/e3112dd2896a5ab9a04995b63a291e25",
+      "avatar_url": ".github/assets/profile-pictures/iiv.png",
       "contributions": [
         "translation"
       ]
@@ -158,7 +158,7 @@
       "login": "megaglaceon",
       "name": "Mega Glaceon",
       "profile": "https://github.com/a-mcego",
-      "avatar_url": "https://cdn.discordapp.com/avatars/186212508141355008/b7fa1e78f6ade0dc25e273f8e1293a02",
+      "avatar_url": ".github/assets/profile-pictures/mega-glaceon.png",
       "contributions": [
         "translation"
       ]
@@ -167,47 +167,47 @@
       "login": "rottingrat666",
       "name": "Mike",
       "profile": "https://instagram.com/mike_dishakjian",
-      "avatar_url": "https://cdn.discordapp.com/avatars/529666071498719242/f78de19eb2908837512e3ad1fa3e0b04",
+      "avatar_url": ".github/assets/profile-pictures/mike.jpeg",
       "contributions": [
         "translation"
       ]
     },
     {
       "login": "moorddroom",
       "name": "Moorddroom",
-      "avatar_url": "https://cdn.discordapp.com/avatars/656160896607059981/bdc8577fed934534b360c4ae7e2f3a1c",
+      "avatar_url": ".github/assets/profile-pictures/moorddroom.jpeg",
       "contributions": [
         "translation"
       ]
     },
     {
       "login": "noxys",
       "name": "Noxys",
-      "avatar_url": "https://cdn.discordapp.com/avatars/357538166061924353/b17381ebebbbe9ed5cb3e896385ff484",
+      "avatar_url": ".github/assets/profile-pictures/noxys.png",
       "contributions": [
         "translation"
       ]
     },
     {
       "login": "okruchchleba",
       "name": "Okruch Chleba",
-      "avatar_url": "https://cdn.discordapp.com/avatars/403581106042961930/121e69ac1270d5ee429babb4a0a9e71f",
+      "avatar_url": ".github/assets/profile-pictures/okruch-chleba.png",
       "contributions": [
         "translation"
       ]
     },
     {
       "login": "pascu",
       "name": "Pascu",
-      "avatar_url": "https://cdn.discordapp.com/avatars/768748522878533632/760e36aeb3d26daf2fb6b692a83c25b1",
+      "avatar_url": ".github/assets/profile-pictures/pascu.png",
       "contributions": [
         "ideas"
       ]
     },
     {
       "login": "rodutnotira",
       "name": "Rodut Notira",
-      "avatar_url": "https://cdn.discordapp.com/avatars/502427080877801484/b1a1321690a117ccb34e2e9f6f8c379f",
+      "avatar_url": ".github/assets/profile-pictures/rodut-notira.png",
       "contributions": [
         "translation"
       ]
@@ -216,23 +216,23 @@
       "login": "telemaniak",
       "name": "Telemaniak",
       "profile": "mailto:[email protected]",
-      "avatar_url": "https://cdn.discordapp.com/avatars/410812091071725598/fe4b4e5571f225ab21122a9c7d570375",
+      "avatar_url": ".github/assets/profile-pictures/telemaniak.png",
       "contributions": [
         "translation"
       ]
     },
     {
       "login": "theodeninmuhafizi",
       "name": "Theodenin Muhafizi",
-      "avatar_url": "https://cdn.discordapp.com/avatars/1051504441087496252/969b91a85cbb1ff22eda2abec44d0858",
+      "avatar_url": ".github/assets/profile-pictures/theodenin-muhafizi.png",
       "contributions": [
         "translation"
       ]
     },
     {
       "login": "yeetfe",
       "name": "Yeetfe",
-      "avatar_url": "https://cdn.discordapp.com/avatars/249248581435916299/dd990da7972f150a4ff58868a90cd0dd",
+      "avatar_url": ".github/assets/profile-pictures/yeetfe.png",
       "contributions": [
         "translation"
       ]