Add complete community documentation

- README.md: Product overview + issue tracker landing
- SECURITY.md: Responsible disclosure policy
- CODE_OF_CONDUCT.md: Community guidelines
- CONTRIBUTING.md: How to contribute
- SUPPORT.md: Comprehensive support guide
- Issue templates: Bug, feature, support, docs, security

All references updated to evercatch.dev domain.

.gitea/issue_template/support_request.md

@@ -0,0 +1,52 @@
+---
+name: ❓ Support Request
+about: Get help with using Evercatch
+title: '[SUPPORT] '
+labels: question
+assignees: ''
+---
+
+## Issue Summary
+<!-- Brief description of what you need help with -->
+
+## What I'm Trying to Do
+<!-- Describe your goal -->
+
+## What I've Tried
+<!-- List what you've already attempted -->
+
+1. 
+2. 
+3. 
+
+## Account Information
+- **Email**: (your account email)
+- **User ID** (if known): 
+- **Subscription Tier**: Sandbox / Indie / Studio / Enterprise
+
+## Relevant Documentation
+<!-- Links to docs you've read -->
+- [ ] I've searched [docs.evercatch.dev](https://docs.evercatch.dev)
+- [ ] I've checked [existing issues](../../issues)
+- [ ] I've reviewed the [API docs](https://docs.evercatch.dev/api)
+
+## Error Messages
+<!-- If applicable, paste any error messages -->
+```
+Paste error here
+```
+
+## Questions
+1. 
+2. 
+
+## Screenshots
+<!-- If applicable, add screenshots -->
+
+---
+
+**💡 TIP:** Before opening a support ticket, check:
+- [Documentation](https://docs.evercatch.dev)
+- [API Reference](https://docs.evercatch.dev/api)
+- [Existing Issues](../../issues)
+- [Status Page](https://status.evercatch.dev)