* Go flagless to allow custom user defined flags. Fixes#301
* Add --cache-dir flag for cache plugin (when used with on-disk store)
* Enable discovery of flags from external plugins, example those that reside outside of proxy.py package and loaded on demand. This also allows external flags to surface in --help section
* Define --filtered-client-ips flag for FilterByClientIpPlugin
* Initialize MacOS Menubar application
* Dashboard plugin at-least needs a shutdown hook to teardown any thread/processes started by dashboard backend plugin
* Add menu bar icon
* Add respective test directories
* Sync test banners
* Move plugin tests under its own package
* Enable daemon for threads, other this wont shutdown cleanly
* Move tests into individual modules too
* Ensure one test class per file
* Fix docker image after refactoring
* Add github actions workflow for building docker image
* Fix image name
* Setup python required for extracting proxy version
* Version will also require deps