- Added `next-intl` dependency to `package.json` for internationalization support.
- Updated `pnpm-lock.yaml` to reflect the new dependency and its version.
- Revised LemonSpace Manifest and PRD to version 1.5, including updates to authentication methods and new features for offline sync and canvas management.
- Deleted the LemonSpace Manifest v1.2, Phase 1 TODO, and PRD v1.1 documents as they are no longer relevant to the current project scope.
- This cleanup helps streamline the documentation and focuses on the latest project requirements and updates.
