* Refactor CI workflow and add Linux packaging support; update app title to "Vaani"
* Refactor CI workflow to separate setup, testing, and building steps; add Linux AppImage packaging support
* use reusable workflow
* Make Flutter version input optional in setup-env action and rename step in workflow
* Replace setup-env action with reusable flutter-setup workflow; streamline CI configuration and enhance dependency management
* Add Flutter setup composite action for streamlined environment configuration
* Move repository checkout step to the main workflow for better control and clarity in the CI process
* Remove unnecessary shell specification for Flutter dependency setup to simplify action configuration
* Add shell specification for Flutter dependency command to enhance cross-platform compatibility
* Comment out static analysis step in Flutter test workflow to streamline CI process
* Add repository checkout and Flutter environment setup steps to CI workflow
* Add installation of Linux dependencies for Flutter test workflow
* Remove obsolete Flutter setup and release workflows to streamline CI configuration
* Fix formatting in make_config.yaml by ensuring newline at end of file
* refactor: consolidate theme definitions by removing separate dark and light theme files
* feat: integrate dynamic color support and enhance theme settings management
* feat: add theme settings route and update theme management in app settings
* feat: enhance theme management by integrating high contrast support in various components
* feat: implement mode selection dialog for theme settings and enhance button functionality
* refactor: update theme import paths and consolidate theme provider files
* feat: enhance theme management by integrating theme selection based on audiobook playback
* refactor: update default value for useMaterialThemeFromSystem to false in theme settings
* refactor: adjust high contrast condition order in theme settings for consistency
* refactor: rename useMaterialThemeOfPlayingItem to useCurrentPlayerThemeThroughoutApp for clarity
* refactor: correct spelling in system theme provider and replace with updated implementation
* refactor: extract restore backup dialog into a separate widget for improved readability
* refactor: reorganize settings sections for clarity and improve restore dialog functionality
