chore: avb transition and automated testing setup

.htmlvalidate.json

@@ -0,0 +1,26 @@
+{
+  "extends": ["html-validate:recommended", "html-validate:document"],
+  "rules": {
+    "require-sri": "off",
+    "meta-refresh": "off",
+    "heading-level": "warn",
+    "no-trailing-whitespace": "off",
+    "wcag/h37": "warn",
+    "no-inline-style": "off",
+    "svg-focusable": "off",
+    "attribute-boolean-style": "off",
+    "attr-case": "off",
+    "void-style": "off",
+    "no-implicit-button-type": "off",
+    "unique-landmark": "off",
+    "long-title": "off",
+    "valid-id": "off",
+    "element-required-attributes": "off",
+    "attribute-empty-style": "off",
+    "element-permitted-content": "off",
+    "element-required-content": "off",
+    "element-permitted-parent": "off",
+    "no-implicit-close": "off",
+    "close-order": "off"
+  }
+}