chore(docs): use gh action to build docs (#8097)

# Which Problems Are Solved

This allows us to build multiple docs in parallel and only runs when
docs/proto are changed.

# Additional Changes

- [ ] Change "required" in GitHub from Vercel to the docs flow

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>

docs/babel.config.js

@@ -1,4 +1,4 @@
 module.exports = {
   presets: [require.resolve("@docusaurus/core/lib/babel/preset")],
-  compact: true
+  compact: auto
 };