Add MIT license and README

LICENSE

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+MIT License
+
+Copyright (c) 2026 Narcasung
+
+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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+# HideCoA
+
+A World of Warcraft 3.3.5 addon for Conquest of Azeroth (CoA) that lets you
+hide its custom class-resource frames.
+
+## Installation
+
+Drop the `HideCoA` folder into your `Interface\AddOns` directory.
+
+## Usage
+
+Open the options panel from `Interface > AddOns > HideCoAUI`. It has two
+subcategories:
+
+- **Classes** — pick a class from the sidebar and toggle which frames are
+  hidden for it.
+- **Character Override** — assign a profile to the currently logged
+  character, and optionally override its frame visibility independently of
+  the assigned profile's class settings.
+
+## License
+
+MIT — see [LICENSE](LICENSE).