Uses the content files from theme team and a11y team from official repos. (#19)

https://github.com/wpaccessibility/a11y-theme-unit-test
and 
https://github.com/WordPress/theme-test-data

Author: bph

blueprints/theme-a11y-test/blueprint.json

@@ -0,0 +1,56 @@
+{
+    "$schema": "https://playground.wordpress.net/blueprint-schema.json",
+    "meta": {
+        "title": "Theme Tester",
+        "description": "Blueprint example to add content and plugins to explore a theme",
+        "author": "bph",
+        "categories": ["themes", "content"]
+    },
+    "preferredVersions":{
+        "php":"8.0",
+        "wp":"beta"
+    },
+    "features":{
+        "networking":true
+    },
+    "steps":[
+        {
+            "step": "login"
+        },
+        {
+            "step":"importWxr",
+            "file":{
+                "resource":"url",
+                "url": "https://raw.githubusercontent.com/wpaccessibility/a11y-theme-unit-test/master/a11y-theme-unit-test-data.xml"
+                }
+        },
+        {
+            "step":"importWxr",
+            "file":{
+                "resource":"url",
+                "url":"https://raw.githubusercontent.com/WordPress/theme-test-data/master/themeunittestdata.wordpress.xml"
+                }
+        },  
+        {
+            "step":"installPlugin",
+            "pluginZipFile":{
+            "resource":"wordpress.org/plugins",
+            "slug":"create-block-theme"
+            },
+            "progress":{
+                "weight":2
+            }
+        },
+        {
+
+            "step": "installTheme",
+            "themeZipFile": {
+                "resource": "wordpress.org/themes",
+                "slug": "twentytwentyfour"
+            },
+            "options": {
+                "activate": true
+            }
+    }
+    ]
+}