Prusa-connect-sdk-printer

* Added new flat struct for filesystem, old one is renamed to legacy
* transfer_id moved to root to all events
* New kwargs parameter "force" added to DELETE_FOLDER command
* Camera support
- Autodetection
- Resolution changing
- Trigger schemes for time and layer based values
- Camera ordering preparation
- Config saving, loading and updating
* Fix priority commands (RESET_PRINTER)
* Remove PREPARED, use only READY and IDLE
* Shorten the request timeout from 30 to 10 seconds
* Transfer ID changed from 64bit to 32bit number
* IDLE / READY states correction
* Improve error callbacks
* File and Folder name validation
* Registration headers update
* Create directory function does nothing if folder already exists
* get_free_space() replaced by get_space_info(), added total size info
* Make on the fly download throttling possible
* Add mesh bed levelling event
* Added command_id to telemetry, if there's a command in progress
* 4xx responses handling change
* Add sheet settings and mbl data
* Add Transfer ID as a 64-bit int
* Added new SET_PRINTER_READY / CANCEL_PRINTER_READY cmds
* Inotify fix - handling nested files
* Introduce a new conditions system
* Added StorageType enum to const
* TRANSFER_INFO improvement
* Make downloads from connect time out after 30s of inactivity
* Send state in every Event

* Introduce `const.State.PREPARED`
* remove m_time from file structure
* telemetry method use self.state instead of argument state
* Filesystem can mount directory to root
* Fixed last_updated value for nested files
* Added LOAD/UNLOAD filament constants
* Added TransferInfo class and TransferType contants
* Changed DOWNLOAD constants to TRANSFER
* Download object replaced by Transfer object
* Refactor of Transfer object, added reset method
* Implementation of START_URL_DOWNLOAD and START_CONNECT_DOWNLOAD commands
* Added RegistrationStatus constants
* Added code attribute to Printer
* Added filename length and forbidden characters check
* Added foldername length check
* Filename and foldername exceptions rework
* Temporary-Code header changed to Code, added printer_type attribute

* FILE_CHANGED event sends free_space
* Fix metadata parsing being slow (works for supported files)
* Metadata parsing is not loading the whole gcode file into RAM anymore
* Added additional network info
* Implement DOWNLOAD, DOWNLOAD_INFO and DOWNLOAD_STOP command
* checked state flag support
* Error states iteration support
* Added m_timestamp to file attributes
* Command classes store both args and kwargs.
* `max_retries` can be passed to Printer
* Command handlers use kwargs.

* new CONNECTION_TIOMEOUT constant set to 30s
* better Event repr
* estimated_to_seconds do not need seconds

* fix update file structure
* add commands DELETE_FILE,DELETE_DIRECTORY,CREATE_DIRECTORY
* add error.ErrorState - chained error state infrastructure
* rename metadata.*filaname to metadata.*path where appropriate
* check gcode extensions ".gcode", ".gc", ".g", ".gco" for FDM
* bugfix: don't fail on extracting metadata from non-existing files
* introduce basic ErrorState instances in errors.py and use in __init__.py
* introduce errors.TOKEN signaling if a token is available
* add ironing to FDM metadata
* introduce `File.size` as a settable property
* added functions for save/load cache of data
* fix event data structure
* new STOPPED state
* typed package
* load() function and test_metadata modification
* cache file name modification
* if metadata are empty, cache is not created
* No notification handler
* No communication without token
* automatically creating and delete cache using inotify handler
* SDK ignores hidden .<filename> files
* SDK ignores hidden .<foldername> folders and files inside
* Don't throw an exception on processing invalid metadata
* layer_height attribute added to FDM metadata
* estimated_to_seconds function
* Added function for check free space of storage
* Send `Clock-Adjusted: 1` header on clock adjustments
* Added free_space attribute for INFO, MEDIUM_INSERTED and FILE_CHANGED events
* Added last_updated attribute to Mount class
* new stop_loop method
* inotify_handler is not call in Printer.loop
* get_file_info` raises a ValueError for dirs
* fingerprint in INFO event

* get_token method called in Printer.loop
* Python 3.9 check
* api_key in INFO event
* metadata in file_info
* preview in metadata