Ubo-app

- feat(core): add `qrcode_input` utility function to let developers easily take input using qrcode through camera, wireless flow now also uses this function, in dev environment it reads the text from `/tmp/qrcode_input.txt` instead
- feat(docker): add `environment_variables` and `command` to image description, both allowing functions as their values, these functions get evaluated when the image is being created
- refactor(core): improve `load_services` so that `ubo_handle.py` files are enforced to be pure and can't import anything, services can start importing once their thread is started.
- fix(image): add `apt remove orca` to image creation scripts 48
- fix(image): resolve the issue of audio driver installation 53
- refactor(test): stability fixture now stops after 4 seconds
- feat(test): introduce `UBO_DEBUG_TEST_UUID` environment variable for tracking the sequence of uuid generations in the tests, it prints the traceback for each call to `uuid.uuid4` if it is set
- fix(wifi): change `_remote_object_path` to `_dbus.object_path` for sdbus objects 57

- refactor(style): update `ubo-gui` to the latest version and set placeholder for all menus

- chore(debug): setup sentry for error tracking

- feat(docker): add ngrok service (currently serves port 22 with no auth token)
- refactor(style): update `ubo-gui` to the latest version and change all icons to use nerd font icons
- refactor(serviceS): change the loading order of the services
- feat(ssh): add ssh service to create and remove temporary ssh target users
- fix(server): it would miss commands coming together in a single packet, now it waits for the next packet if the current packet is not a complete command and it doesn't miss extra commands in the packet if it has multiple commands.

- test: add wireless flow test, work in progress
- refactor(services): add `init` parameter to `register_service`
- chore(test): generate and collect screenshots in GitHub workflow
- refactor(test): make the return value of `wait_for` reusable
- refactor(test): organize fixtures in different files
- feat(test): introduce `load_services` and `stability` fixtures

- chore(test): improve snapshot tests to detect extra/less snapshots too
- chore(test): better organize snapshot results in sub-directories
- chore(test): collect mismatching snapshots (store and window) in GitHub workflow
- chore(test): add `--override-window-snapshots` to `pytest` to intentionally override window snapshots when they have changed
- chore(test): add `--make-screenshots` to `pytest` to create window screenshots to help find the differences visually
- chore(test): monkeypatchings for dynamic parts of the app to make tests consistent
- refactor: general improvements in the codebase to address issues found during writing tests
- chore: add badges to `README.md`
- chore: add `Dockerfile.dev` for development, it helps to build consistent screenshots in macOS