website/docs: Prepare for monorepo. (#14119)

* docusaurus-theme: Fix header alignment, overscroll, vertical padding.

* docusaurus-theme: Lint.

* website/docs: Prepare for monorepo packages.

* website/docs: Clean up dependencies. Tidy table.

* website/docs: Fix issue where Prettier affects example content.

* website/docs: Temp fix for stale packages.

.vscode/settings.json

@@ -32,5 +32,9 @@
     "go.testFlags": ["-count=1"],
     "github-actions.workflows.pinned.workflows": [
         ".github/workflows/ci-main.yml"
-    ]
+    ],
+
+    "[mdx]": {
+        "editor.defaultFormatter": "esbenp.prettier-vscode"
+    }
 }