feat(v2): Implement proof-of-concept Docusaurus Debug Dashboard (#2928)

* feat(v2): Implement proof-of-concept Docusaurus Debug Dashboard

* Ensure we show the exact boolean

packages/docusaurus-plugin-debug/src/index.ts

@@ -0,0 +1,31 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import {LoadContext, Plugin} from '@docusaurus/types';
+import {normalizeUrl} from '@docusaurus/utils';
+
+import path from 'path';
+
+export default function pluginContentPages({
+  siteConfig: {baseUrl},
+}: LoadContext): Plugin<void> {
+  return {
+    name: 'docusaurus-plugin-debug',
+
+    getThemePath() {
+      return path.resolve(__dirname, '../src/theme');
+    },
+
+    contentLoaded({actions: {addRoute}}) {
+      addRoute({
+        path: normalizeUrl([baseUrl, '__docusaurus/debug']),
+        component: '@theme/Debug',
+        exact: true,
+      });
+    },
+  };
+}