Rename all workspace packages to reflect the actual project name:
- @caldav/client -> @calchat/client
- @caldav/server -> @calchat/server
- @caldav/shared -> @calchat/shared
- Root package: caldav-mono -> calchat-mono
Update all import statements across client and server to use the new
package names. Update default MongoDB database name and logging service
identifier accordingly.
- Add eas.json with development, preview, and production profiles
- Configure preview profile for APK builds (arm64-v8a only)
- Add build:apk npm script for local builds
- Update app.json with app name and Android package
- Add expo-build-properties dependency
- Update CLAUDE.md with build documentation
