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.

website/src/components/SupportBadge.tsx

@@ -1,8 +1,5 @@
+import { SupportLevelToLabel, isSupportLevel } from "@site/remark/support-directive.mjs";
 import React from "react";
-import {
-    isSupportLevel,
-    SupportLevelToLabel,
-} from "@site/remark/support-directive";
 
 export interface SupportBadgeProps {
     level: string;