feat: add OIDC/SSO enterprise login support

[giutrec]

• Modified frontend/rust-lib/Cargo.toml to include patch for AppFlowy-Cloud.
• Added Saml and Oidc variants to ProviderTypePB enum in frontend/rust-lib/flowy-user/src/entities/auth.rs.
• Mapped 'sso' to ProviderTypePB.Oidc in af_cloud_auth_service.dart.
• Added 'sso' variant to ThirdPartySignInButtonType enum and updated UI components.
• Integrated SSO login button into the sign-in screens.
• Ignored build_dockers.sh in .gitignore.

Feature Preview

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PR Checklist

• My code adheres to AppFlowy's Conventions
• I've listed at least one issue that this PR fixes in the description above.
• I've added a test(s) to validate changes in this PR, or this PR only contains semantic changes.
• All existing tests are passing.

Summary by Sourcery

Add support for enterprise SSO/OIDC login across frontend and Rust user auth, including wiring the new provider type through the sign-in UI and auth service.

New Features:

• Expose a new SSO/enterprise login option in desktop and mobile sign-in screens.
• Introduce an SSO provider type in the Flutter auth layer mapped to an OIDC provider in the Rust user auth entities.

Enhancements:

• Patch Rust client dependencies to local AppFlowy-Cloud paths for client API and related entities.

Chores:

• Ignore the build_dockers.sh script in version control.

[sourcery-ai]

Reviewer's Guide

Adds enterprise SSO (OIDC) login support end-to-end by wiring a new SSO provider type from Rust auth entities through Flutter auth services and UI, plus pointing the Rust client to local AppFlowy-Cloud patches and ignoring a local Docker helper script.

File-Level Changes

Change	Details	Files
Add SSO button type and integrate it into desktop and mobile sign-in UIs	Extend ThirdPartySignInButtonType enum with an sso variant, including provider id mapping, icon selection, label text, and theming cases Insert DesktopThirdPartySignInButton and MobileThirdPartySignInButton instances for SSO into existing third-party sign-in layouts, wired to onSignIn callbacks	frontend/appflowy_flutter/lib/user/presentation/screens/sign_in_screen/widgets/third_party_sign_in_button/third_party_sign_in_buttons.dart frontend/appflowy_flutter/lib/user/presentation/screens/sign_in_screen/widgets/third_party_sign_in_button/third_party_sign_in_button.dart
Introduce SAML and OIDC provider types in Rust auth model and map SSO to OIDC in Flutter auth service	Add Saml and Oidc variants to ProviderTypePB enum with explicit numeric ids Extend ProviderTypePB::value_string to return "saml" and "oidc" for new variants Map incoming provider string "sso" to ProviderTypePB.Oidc in ProviderTypePBExtension	frontend/rust-lib/flowy-user/src/entities/auth.rs frontend/appflowy_flutter/lib/user/application/auth/af_cloud_auth_service.dart
Point Rust frontend to local AppFlowy-Cloud client libraries for development	Add Cargo.toml patch section overriding AppFlowy-Cloud client-api, client-api-entity, workspace-template, and gotrue-entity crates to local paths	frontend/rust-lib/Cargo.toml
Ignore local Docker build script	Add build_dockers.sh to .gitignore to prevent it from being tracked	.gitignore

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[CLAassistant]

All committers have signed the CLA.

[sourcery-ai]

Hey - I've left some high level feedback:

• The SSO button label is hardcoded as 'Enterprise Login (SSO)' instead of using a localized key like the other providers; consider adding a LocaleKeys entry for this string to keep i18n consistent.
• The new SSO button is always rendered on both desktop and mobile; if SSO is only available in certain deployments or behind a feature flag, consider conditionally showing this button based on configuration or server capabilities.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The SSO button label is hardcoded as `'Enterprise Login (SSO)'` instead of using a localized key like the other providers; consider adding a `LocaleKeys` entry for this string to keep i18n consistent.
- The new SSO button is always rendered on both desktop and mobile; if SSO is only available in certain deployments or behind a feature flag, consider conditionally showing this button based on configuration or server capabilities.

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[github-actions]

🥷 Ninja i18n – 🛎️ Translations need to be updated

Project /project.inlang

lint rule	new reports	level	link
Missing translation	29	warning	contribute (via Fink 🐦)