* ayon workfiles tool initial commit
* separated models into smaller files
* workfile can be listed and opened
* added browse logic
* added TODO for helper functions
* modified abstract controller
* implemented required methods
* base of save dialog
* added project settings to controller
* set context of side panel on init
* implemented save as dialog
* cleanup expected selection
* unify controller variable name
* base of published workfiles
* working published workfile copy
* added more missing features from workfiles tool
* Changed size policy of buttons to fill space vertically
* added overlay messages
* moved objects to abstraction
* moved 'window.py' to widgets
* small modifications in widgets
* get_workfile_info returns object
* filled docstrings in abstractions
* finishing touches
* backwards compatible work with host
* close window on successfull open
* remove indentation completelly
* added style for overlay label
* added handling of invalid host in controller
* added overlay with message if host is not valid
* added missing feature of disabled save
* use ayon_workfiles in ayon mode
* cleanup
* hound fixes
* use asset doc for 'change_current_context'
* added duplication action
* removed unused attributes and methods
* refresh workarea view on save as finished
* support host integrations without 'HostBase'
* fix 'filepath' fill
* reset item cache on save
* do not handle filepath in prepare workfile
* rename '_create_workfile_doc' > '_create_workfile_info_entity'
* fill comment before formatting
* fix column count by not calling 'clear'
* more explicit name of method
* use 'setHeaderData' to define header labels
* mimic changes from workarea widget in published widget
- Collect the rig sets only once (I've ordered it before Collect History so that the instance still contains less node, as an optimization)
- Also fixes a hard error when `out_SET` is not found, instead now only relevant `PublishValidationError` are raised to generate a nice report
