Add files to .gitignore (dirty state when GUT is used as a submodule)

[abstractionfactory]

When using GUT as a submodule, there are extra left-over files after opening the parent project in Godot. This could be fixed by adding the following to .gitignore or by adding the files to the repository:

*.import
*.uid

Full output of git status

HEAD detached at v9.3.0
Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
        modified:   addons/gut/fonts/AnonymousPro-Bold.ttf.import
        modified:   addons/gut/fonts/AnonymousPro-BoldItalic.ttf.import
        modified:   addons/gut/fonts/AnonymousPro-Italic.ttf.import
        modified:   addons/gut/fonts/AnonymousPro-Regular.ttf.import
        modified:   addons/gut/fonts/CourierPrime-Bold.ttf.import
        modified:   addons/gut/fonts/CourierPrime-BoldItalic.ttf.import
        modified:   addons/gut/fonts/CourierPrime-Italic.ttf.import
        modified:   addons/gut/fonts/CourierPrime-Regular.ttf.import
        modified:   addons/gut/fonts/LobsterTwo-Bold.ttf.import
        modified:   addons/gut/fonts/LobsterTwo-BoldItalic.ttf.import
        modified:   addons/gut/fonts/LobsterTwo-Italic.ttf.import
        modified:   addons/gut/fonts/LobsterTwo-Regular.ttf.import

Untracked files:
  (use "git add <file>..." to include in what will be committed)
        addons/gut/GutScene.gd.uid
        addons/gut/UserFileViewer.gd.uid
        addons/gut/autofree.gd.uid
        addons/gut/awaiter.gd.uid
        addons/gut/cli/gut_cli.gd.uid
        addons/gut/cli/optparse.gd.uid
        addons/gut/collected_script.gd.uid
        addons/gut/collected_test.gd.uid
        addons/gut/comparator.gd.uid
        addons/gut/compare_result.gd.uid
        addons/gut/diff_formatter.gd.uid
        addons/gut/diff_tool.gd.uid
        addons/gut/double_tools.gd.uid
        addons/gut/doubler.gd.uid
        addons/gut/dynamic_gdscript.gd.uid
        addons/gut/gui/BottomPanelShortcuts.gd.uid
        addons/gut/gui/GutBottomPanel.gd.uid
        addons/gut/gui/GutControl.gd.uid
        addons/gut/gui/GutRunner.gd.uid
        addons/gut/gui/OutputText.gd.uid
        addons/gut/gui/ResizeHandle.gd.uid
        addons/gut/gui/ResultsTree.gd.uid
        addons/gut/gui/RunAtCursor.gd.uid
        addons/gut/gui/RunResults.gd.uid
        addons/gut/gui/ShortcutButton.gd.uid
        addons/gut/gui/editor_globals.gd.uid
        addons/gut/gui/gut_config_gui.gd.uid
        addons/gut/gui/gut_gui.gd.uid
        addons/gut/gui/gut_user_preferences.gd.uid
        addons/gut/gui/panel_controls.gd.uid
        addons/gut/gui/script_text_editor_controls.gd.uid
        addons/gut/gut.gd.uid
        addons/gut/gut_cmdln.gd.uid
        addons/gut/gut_config.gd.uid
        addons/gut/gut_plugin.gd.uid
        addons/gut/gut_to_move.gd.uid
        addons/gut/gut_vscode_debugger.gd.uid
        addons/gut/hook_script.gd.uid
        addons/gut/inner_class_registry.gd.uid
        addons/gut/input_factory.gd.uid
        addons/gut/input_sender.gd.uid
        addons/gut/junit_xml_export.gd.uid
        addons/gut/lazy_loader.gd.uid
        addons/gut/logger.gd.uid
        addons/gut/method_maker.gd.uid
        addons/gut/one_to_many.gd.uid
        addons/gut/orphan_counter.gd.uid
        addons/gut/parameter_factory.gd.uid
        addons/gut/parameter_handler.gd.uid
        addons/gut/printers.gd.uid
        addons/gut/result_exporter.gd.uid
        addons/gut/script_parser.gd.uid
        addons/gut/signal_watcher.gd.uid
        addons/gut/spy.gd.uid
        addons/gut/strutils.gd.uid
        addons/gut/stub_params.gd.uid
        addons/gut/stubber.gd.uid
        addons/gut/summary.gd.uid
        addons/gut/test.gd.uid
        addons/gut/test_collector.gd.uid
        addons/gut/thing_counter.gd.uid
        addons/gut/utils.gd.uid
        addons/gut/version_conversion.gd.uid
        addons/gut/version_numbers.gd.uid
        addons/gut/warnings_manager.gd.uid

Project structure

I'm using submodules as an easier way to manage dependencies and to work around the rather long review times of the Godot asset library. My directory layout is as follows:

├── 📂 addons
│   └── 📂 myaddon
│   └── 🔗 gut → ../vendor/gut/addons/gut (symlink)
└── 📂 vendor
    ├── 📄 .gdignore
    └── 📂 gut (submodule)
        └── 📂 addons
            └── 📂 gut