☂️ v3 tracking issue

[Vinzent03]

This is an umbrella issue for planned changes for v3. of all dart client libraries.

The following issues were first collected in #790:

• Get file id on storage upload #1274
• Rename supabase package to supabase-dart #1275

These are planned as well:

• Migrate from deprecated SharedPreferences to SharedPreferencesAsync #1276
• [ ] Add support for aborting/canceling requests #898
• Assert asyncStorage is provided for PKCE flow in the GoTrue client constructor #1446
• E-mail change should emit userUpdated instead of signedIn #1398
• realtime: support async encode/decode for off-isolate (de)serialization #1401
• v3: use a system web auth session for OAuth/SSO/linkIdentity instead of url_launcher #1402
• refactor(realtime)!: rename conn family and onConnMessage #1404
• v3: breaking/behavioral changes to enable the remaining DCM lint rules #1428
• Use DateTime for expiresAt and other applicable fields #1449
• Move to streams instead of callbacks where suitable for v3 #1520
• Make FunctionException a sealed class for v3 #1550
• Extract shared code from packages into a supabase_common package #1572 (Tier 3 only: shared supabase_common exception base + unified fetch wrappers — the breaking parts of the extraction)
• v3: expose PostgrestRetryOptions as a single public retry config #1576
• breaking(postgrest): thread a real row type parameter through the query/rpc/stream builders #1581