docs(project): add support guidelines

Author: mrclrchtr

.github/SUPPORT.md

@@ -0,0 +1,22 @@
+# Support
+
+Thanks for using `terraform-hcloud-talos`.
+
+## Bugs and feature requests
+
+- Please open a GitHub issue with a minimal reproduction and relevant logs.
+
+## Questions
+
+- If you have a question about configuration or troubleshooting, open an issue and include your Terraform/Talos
+  versions and a redacted configuration snippet or start a discussion.
+
+## Financial support
+
+If this module saved you time or money, consider supporting ongoing maintenance:
+
+- GitHub Sponsors: https://github.com/sponsors/hcloud-talos
+- Buy Me a Coffee: https://buymeacoffee.com/mrclrchtr
+
+Sponsorship is a way to keep the project sustainable and say thanks. It does not include a support SLA. Sponsors can
+be acknowledged publicly via GitHub Sponsors.