* 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
