feat(docs): migrate documentation site into monorepo (#5912)

apps/docs/.gitignore

@@ -0,0 +1,58 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+.idea/
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+.pnpm-store/
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# vercel
+.vercel
+*.tsbuildinfo
+
+# storybook
+storybook-static
+static/data/configs
+
+# https://yarnpkg.com/getting-started/qa#which-files-should-be-gitignored
+# Yarn v2
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+
+# docusaurus
+.docusaurus
+
+# CI Stuff
+screenshots
+test-results