* check for filename in cache subfolder for files started through cloud connected printers
* send 0% progress when in prepare state and progress is 100
* minor UI tweaks
* update pybambu module from upstream HA project, groundwork for fixing new cloud authorization process, #59
* potential fix for stuck progress/canceled printing status, #52
* 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
