- updated core library;
now launcher will check available free space
before downloading anything
- added dxvk 1.10.3
From previous commits:
- added `WINEARCH=win64` to some places
- added `devel` style to `FirstRunApp` if it's debug mode
- changed app's id
- added xdelta3 requirement during initial setup
- added wine & dxvk version selection during initial setup
- added "Open launcher folder" button to settings
- removed `glib::Downgrade` trait from all the `App`s' `Value`s
- removed `tasks` mod; removed `tokio` dependency;
rewritten `OpenPreferencesPage` to work with threads instead of futures
- added `opt-level = 3` to release profile
- upscaled logo to 512x512; added source link
- bundled all the UI files into gtk resources
