* Add separate class for sftp file system
* Add separate serial IO handling class
* Replace function name mangling with gcode handler registration system
* Add states to virtual Bambu printer that manage state specific interaction
* Add synchronization utilities to work with virtual printer as if it is a binary stream
* Add unittests with mocked Bambu printer to ensure core functionality works as expected
* Fix formatting to be automatically processed by black formatter
* Fix python 3.10 type annotations for readability
fix cache file list issues
optimize file listing to only update when retrieving file list and not while selecting or deleting a file
don't remove intermediary file on local storage
