Added license, readme, contributing guidelines

CONTRIBUTING.md

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+# Contributing to papergo
+
+Thanks for helping! Here's how to contribute:
+
+- Fork the repo.
+- Create a branch for your feature or fix.
+- Make your changes and commit with a clear message.
+- Open a pull request. Short and simple is fine.
+- Be nice and respectful.
+
+That's it!
+

LICENSE.md

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+MIT License
+
+Copyright (c) 2025 Papergo
+
+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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+# papergo
+
+A terminal-based game written in Go, inspired by the classic paper.io game.  
+Multiplayer support and simple CLI interface. Open source and open to contributions.
+
+## 🔧 How to run
+
+1. Clone the repo:
+
+   ```bash
+   git clone https://github.com/jsierp/papergo.git
+   cd papergo
+   ```
+
+2. Build and run:
+
+```bash
+   go run .
+```
+
+
+3. Or build a binary:
+
+```bash
+   go build -o papergo
+   ./papergo
+```
+