Add docs app and GitHub Pages deploy

[brunobergher]

Summary

• import the cleaned Docusaurus docs app from Roo-Code-Docs PR #553 into apps/docs
• configure docs for https://roocode.github.io with a CNAME and root baseUrl
• add a GitHub Pages workflow that builds and deploys apps/docs
• add docs workspace dependencies and Turbo build inputs

Verification

• pnpm --filter @roo-code/docs check-types
• pnpm --filter @roo-code/docs lint
• pnpm --filter @roo-code/docs build
• pnpm turbo build --filter @roo-code/docs
• pre-commit hook: pnpm lint
• pre-push hook: pnpm check-types

Notes

• GitHub Pages still needs the repo settings configured to use GitHub Actions as the Pages source, and the roocode.github.io domain may need to be accepted/configured in GitHub Pages settings.

Interactively review PR in Roo Code Cloud