feat!: extract @daypicker/buddhist, @daypicker/ethiopic, and @daypicker/hebrew

[gpbl]

Summary

• extract the Buddhist, Ethiopic, and Hebrew calendar builds into dedicated @daypicker/* packages
• remove the remaining specialty calendar entrypoints from react-day-picker
• update the docs, examples, and website playground to use the add-on packages

Stack

• base branch: feat!: extract @daypicker/hijri and @daypicker/persian #2938

Published package impact

• adds @daypicker/buddhist, @daypicker/ethiopic, and @daypicker/hebrew
• removes react-day-picker/buddhist, react-day-picker/ethiopic, and react-day-picker/hebrew
• completes the specialty-calendar extraction from the main package

Validation

• pnpm typecheck
• pnpm test
• pnpm test:tz
• pnpm build
• pnpm test:build
• pnpm -F website typecheck
• pnpm -F website build
• pnpm check:versions
• pnpm pack:dry-run