refactor: replace debug mode with extensible hook-based system (#630)

* refactor: replace debug mode with extensible hook-based system

- Remove isInDebugMode parameter from initialize() method (BREAKING)
- Implement WorkmanagerDebugHandler interface for both Android and iOS
- Add LoggingDebugHandler for development (uses native logging systems)
- Add NotificationDebugHandler for visual debugging
- Support custom debug handlers for extensible debugging
- No debug output by default - opt-in via platform-specific setup
- Clean separation between core functionality and debug concerns
- Add comprehensive documentation in docs/debug.md

* docs: fix documentation structure for docs.page

- Update existing debugging.mdx instead of creating new files
- Follow proper docs.page structure with frontmatter and tabs
- Remove incorrectly placed debug.md from root docs folder

* feat: complete hook-based debug system implementation

- Replace isInDebugMode parameter with extensible hook system
- Add WorkmanagerDebugHandler interface/protocol for Android/iOS
- Implement LoggingDebugHandler and NotificationDebugHandler
- Add WorkmanagerDebug global registry for handler management
- Remove old DebugNotificationHelper and UserDefaultsHelper debug code
- Update documentation with proper Tabs component syntax
- Clean up workmanager/README.md to avoid duplication with docs.page
- Fix all integration tests and update mocks

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Co-Authored-By: Claude <noreply@anthropic.com>

* feat: finalize hook-based debug system with cross-platform TaskStatus enum

- Move TaskStatus enum to Pigeon for consistent cross-platform types
- Regenerate all Pigeon-generated files with TaskStatus enum
- Update mocks to include deprecated isInDebugMode parameter
- Add backward compatibility test ensuring deprecated parameter still compiles
- Update CLAUDE.md to document code generation workflow

All tests passing and hook-based debug system is complete with:
- Abstract WorkmanagerDebug class with static current handler
- onTaskStatusUpdate and onExceptionEncountered methods
- Complete platform consistency between Android and iOS
- Backward compatibility maintained through deprecation

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Co-Authored-By: Claude <noreply@anthropic.com>

* fix: resolve all GitHub Actions build failures

- Update iOS deployment target to 14.0 for Logger compatibility
- Fix Android TaskStatus import errors in debug handlers
- Fix iOS internal type visibility issues
- Update example app iOS deployment target in Xcode project
- Add comprehensive pre-commit requirements including example builds
- Ensure both Android APK and iOS app build successfully

All platforms now build without errors and pass formatting checks.

* chore: finalize hook-based debug system implementation

All GitHub Actions fixes applied and both example builds working:
- iOS 14.0 deployment target set across all components
- Android TaskStatus imports resolved
- iOS internal type visibility fixed
- Comprehensive pre-commit requirements documented
- Both Android APK and iOS app build successfully

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Co-Authored-By: Claude <noreply@anthropic.com>

* docs: streamline changelog entries for better user experience

- Simplify changelog language to focus on user actions needed
- Remove internal implementation details (Flow observability, Pigeon updates)
- Add clear explanation for KEEP -> UPDATE default change
- Maintain consistent format across all package changelogs
- Keep only user-impacting information and migration guidance

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Co-Authored-By: Claude <noreply@anthropic.com>

* fix: move deprecated_member_use ignore comment to correct line

The ignore comment needs to be on the line where the deprecated parameter
is actually used, not above the return statement.

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Co-Authored-By: Claude <noreply@anthropic.com>

* remove agent

* feat: enhance debug system with task status tracking and configurable notifications

- Replace deprecated isInDebugMode with hook-based debug handlers to slim down plugin
- Add TaskStatus.SCHEDULED and TaskStatus.RESCHEDULED for better task lifecycle visibility
- Fix notification flow: Started → Rescheduled → Retrying → Success
- Add configurable notification channels and grouping for debug handlers
- Update notification icons to cleaner symbols (▶️ ✅ ❌ 🔄 ⏹️ 📅)
- Add comprehensive task status documentation with platform differences
- Fix Android retry detection using runAttemptCount
- Remove duplicate exception notifications for normal task failures
- Update example apps to demonstrate new debug configuration

Fixes #439
Fixes #367
Fixes #556

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Co-Authored-By: Claude <noreply@anthropic.com>

* chore: standardize code formatting and improve example app structure

- Fix Kotlin package naming to follow conventions (dev.fluttercommunity.workmanager.example)
- Use shorthand dot notation in AndroidManifest.xml for cleaner configuration
- Apply ktlint and swiftlint formatting fixes across all platforms
- Remove trailing whitespace from Swift files

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Co-Authored-By: Claude <noreply@anthropic.com>

* docs: update changelogs for hook-based debug system release

- Add new features: NotificationDebugHandler, LoggingDebugHandler, TaskStatus enums
- Document breaking changes for isInDebugMode deprecation
- Include bug fixes for retry detection and periodic task frequency
- Focus on user-facing changes and benefits

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Co-Authored-By: Claude <noreply@anthropic.com>

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Co-authored-by: Claude <noreply@anthropic.com>