zema_firestore 0.1.0

Zema schema validation integration for Cloud Firestore. Type-safe document parsing via withConverter.

0.1.0

• Initial release.
• withZema(schema) extension on CollectionReference, DocumentReference, and Query.
• ZemaFirestoreConverter<T> — hooks into Firestore withConverter, injects document ID, converts DateTime to Timestamp on writes.
• Firebase-specific schemas: zTimestamp(), zGeoPoint(), zDocumentRef(), zBlob().
• ZemaFirestoreException with document path, ID, and List<ZemaIssue>.
• onParseError callback for graceful fallback on schema mismatch.