feat: Flutter SDK update for version 27.1.0-rc.2

[ArnabChatterjee20k]

This PR contains updates to the SDK for version 27.1.0-rc.2 (release candidate).

What's Changed

• Added: Apps service to manage OAuth2 apps, keys, secrets, and installations
• Added: Oauth2 service for authorization, consent, device, PAR, and token flows
• Added: Push service for MQTT realtime push with iOS background delivery
• Added: Topic builder and a native android module for push
• Added: Client.setPushEndpoint() and Client.setPushClientId()
• Added: Avatars.updatePhoto() and Avatars.deletePhoto() methods
• Added: App, Oauth2*, and Account models
• Added: webflow to the OAuthProvider enum

[hansi-codes]

🟢 Tier S · Ready to merge

The version updates are consistent across the repository, with no concrete defects found.

Updates the Flutter SDK release version from 27.1.0-rc.0 to 27.1.0-rc.2. Aligns package metadata, Android metadata, client SDK headers, and documentation without changing API behavior.

Verdict	New comments	Fixed	Still open
✅ Approved	0	0	0

📂 Walkthrough · 6

File	Change
CHANGELOG.md	Updates the current release heading to 27.1.0-rc.2.
README.md	Updates the installation dependency example to 27.1.0-rc.2.
android/build.gradle	Updates the Android library version to 27.1.0-rc.2.
lib/src/client_browser.dart	Updates the browser client's SDK version header.
lib/src/client_io.dart	Updates the IO client's SDK version header.
pubspec.yaml	Updates the package release version to 27.1.0-rc.2.

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_{Reviewed e847cc9 · Details · Comment @hansi-codes review to re-run, or mention @hansi-codes with a question.}

[hansi-codes]

🟢 Tier S · Looks good to merge. Summary