[skip ci] Add short readme

Author: booky10

README.md

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+# CloudChat
+
+A simple Minecraft paper plugin for creating teams based on luckperms permission data.
+
+## Features
+
+- Uses LuckPerms metadata to:
+  - show per-player prefix/suffix in tablist
+  - show per-player prefix/suffix in chat messages
+- Instantly updates prefix/suffix when changed
+
+## Download
+
+https://dl.cloudcraftmc.de/download/tool/cloudchat
+
+**Note: Depends on [LuckPerms](https://luckperms.net/).
+
+## License
+
+Licensed under GPL-3.0, see [LICENSE](./LICENSE) for further information.