Add readme and license

LICENSE.txt

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+Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md).
+Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# Localization of the Godot Engine editor
+
+This repository contains the localization templates and catalogs for the
+[Godot Engine](https://godotengine.org) editor, including the in-editor
+class reference.
+
+The translations are contributed through three projects on [Hosted
+Weblate](https://hosted.weblate.org/projects/godot-engine/):
+
+- [godot](https://hosted.weblate.org/projects/godot-engine/godot/):
+  Strings from the editor interface.
+- [godot-properties](https://hosted.weblate.org/projects/godot-engine/godot-properties/):
+  Strings extracted from property names and project/editor settings.
+- [godot-class-reference](https://hosted.weblate.org/projects/godot-engine/godot-class-reference/):
+  Class reference for the Godot API.
+
+## License
+
+All the translation content of this repository (`msgid`, `msgstr`) is
+licensed under the MIT license, like Godot itself.
+See [LICENSE.txt](/LICENSE.txt) for details.
+
+The shell scripts are in the public domain.