Crash reporting

[sameerasw]

This pull request introduces a new in-app crash reporting and notification system to replace the previous Sentry-based solution. It adds custom crash handling, user notifications, and a user interface for viewing and sharing crash reports, while removing all Sentry dependencies and related code.

Crash reporting and notification system:

• Introduced a custom crash handler (CrashHandler) that writes crash reports to a local file, checks user preferences for notification, and triggers a notification if enabled.
• Added a notification helper (CrashNotificationHelper) to manage crash notification channels and display actionable notifications, including options to dismiss or report a crash.
• Implemented a broadcast receiver (CrashNotificationReceiver) to handle notification dismissal actions.
• Registered the new receiver and activity in AndroidManifest.xml, and removed Sentry auto-init configuration. [1] [2]

Crash report user interface:

• Added a CrashReportActivity that displays the crash log in a bottom sheet, allowing users to copy, save, email, or open a GitHub issue with the report. [1] [2]

Dependency and code cleanup:

• Removed all Sentry dependencies and initialization code from the project, including related DataStore preferences. [1] [2] [3] [4] [5] [6]
• Added the new exceptionreport module as a dependency, and integrated it to trigger the custom crash handler from MainActivity. [1] [2] [3]

Preferences update:

• Introduced a new DataStore preference (notify_on_crash) to control whether users receive crash notifications.