firebase_storage_watchos 0.0.1-beta.1

watchOS implementation of firebase_storage, bridging the Firebase Apple SDK (FirebaseStorage) over dart:ffi for uploads, downloads, and metadata.

0.0.1-beta.1

• Initial watchOS implementation of firebase_storage: a dart:ffi bridge over the Firebase Apple SDK (FirebaseStorage) implementing references (delete, download URLs, metadata, list/listAll), data transfer (getData, putData/putString/putFile, writeToFile) with native task progress (snapshot events, pause/resume/cancel), and instance configuration (emulator, retry times).
• Scaffolded with flutter-watchos plugin port, then hand-finished.
• Links the Firebase Apple SDK via the CLI's external-SwiftPM-dependency support. Verified on the watch simulator: host unit tests (14/14) and an on-simulator smoke test against the real Storage backend. Not yet verified on physical watch hardware; published as a pre-release.