feat: Migrate to Plugin DSL syntax

[Mastermind-sap]

Description

Makes the project support new syntax of gradle and build with newer flutter versions.

Proposed Changes

• Upgraded Gradle syntax to new Plugin DSL syntax
• Bumped AGP to 8.1.0, and kotlin version to 1.9.10
• Declared namespace "com.ccextractor.ultimate_alarm_clock"
• Upgraded outdated packages (flutter pub upgrade --major-versions)
• isar is starting to update currently; switching to community fork version can be later switched back
• Shake is not maintained , used shake_gesture instead
• Telephony not maintained; Shifted to flutter_background_messenger

Fixes #693

Checklist

• [ ] Tests have been added or updated to cover the changes
• [ ] Documentation has been updated to reflect the changes
• [x] Code follows the established coding style guidelines
• [ ] All tests are passing

[Mastermind-sap]

@MarkisDev Could you please review this PR?