Bundle the font

For performance, offline support and privacy.

Cut down the CSS file from the package so that we only need to bundle
the one font file, like what Google was doing.

assets/index.html

@@ -6,7 +6,7 @@
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <meta http-equiv="X-UA-Compatible" content="ie=edge">
   <title>speedscope</title>
-  <link href="https://fonts.googleapis.com/css?family=Source+Code+Pro" rel="stylesheet">
+  <link href="source-code-pro.css" rel="stylesheet">
   <script>
     // https://github.com/evanw/webgl-recorder
     false && (function () {
@@ -169,4 +169,4 @@
   <script src="../src/speedscope.tsx"></script>
 </body>
 
-</html>
+</html>

assets/source-code-pro.css

@@ -0,0 +1,7 @@
+@font-face{
+	font-family: 'Source Code Pro';
+	font-weight: 400;
+	font-style: normal;
+	font-stretch: normal;
+	src: url('../node_modules/source-code-pro/TTF/SourceCodePro-Regular.ttf') format('truetype');
+}

package.json

@@ -49,6 +49,7 @@
     "preact": "10.4.1",
     "prettier": "2.0.4",
     "protobufjs": "6.8.8",
+    "source-code-pro": "2.38.0",
     "source-map": "0.6.1",
     "ts-jest": "24.3.0",
     "typescript": "4.2.3",