Add _Sidebar

_Sidebar.md

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+### Support
+
+- **Issues**: https://git.serendipity.systems/k.eaven/pterodactyl-discord-bot/issues
+- **Documentation**: Check [README.md](https://git.serendipity.systems/k.eaven/pterodactyl-discord-bot/src/branch/main/README.md) and [Wiki](https://git.serendipity.systems/k.eaven/pterodactyl-discord-bot/wiki)
+- **License**: GPL-3.0 (see [LICENSE](https://git.serendipity.systems/k.eaven/pterodactyl-discord-bot/src/branch/main/LICENSE) file)
+
+#### Important Note
+This is private git infrastructure. If you want to contribute to any project hosted on this site or create your own repositories here, please email the [admin](https://git.serendipity.systems/k.eaven) (kimura.eaven@gmail.com) to set up an account for you.
+
+---
+
+**Thank you for contributing to Pterodactyl Discord Bot!** 🎉
+
+Your contributions help make Pterodactyl server management more accessible for everyone in the community.