Migrate to Qt6, Cmake & GitHub workflows (#199)

* Migrate to Qt6, Cmake & GH workflows

* Remove modules: field for Qt action

* Use workspace path when referrign resources.

* Try locating executable on linux.

* Fix missing plist on mac build

* Use linuxdeploy/linuxdeploy for linux builds

* Fix app output on macos builds

* Fix for linux icon related issues.

* Fix for damaged app on macos

* Try fixing icon for linux yet again.

* Fix RPATH on macos app

* Fix issues on app inside DMG

* Fix icon for DMG image

* Fix executable resolution on windows

* Fix exe icon for windows

* Upload binaries to release

* Updates to README

Author: vaibhavpandeyvpz