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/documentation.md

@@ -0,0 +1,45 @@
+---
+name: 📚 Documentation Issue
+about: Report missing, incorrect, or unclear documentation
+title: '[DOCS] '
+labels: documentation
+assignees: ''
+---
+
+## Documentation Page
+<!-- Link to the docs page with the issue -->
+https://docs.evercatch.dev/...
+
+## Issue Type
+- [ ] Missing documentation
+- [ ] Incorrect information
+- [ ] Unclear/confusing explanation
+- [ ] Broken link
+- [ ] Code example doesn't work
+- [ ] Typo/grammar
+- [ ] Outdated information
+
+## Description
+<!-- What's wrong with the docs? -->
+
+## Current Content
+<!-- Quote the current problematic content -->
+```
+Current text/code here
+```
+
+## Suggested Fix
+<!-- How would you improve it? -->
+```
+Suggested text/code here
+```
+
+## Additional Context
+<!-- Screenshots, correct information, working examples, etc. -->
+
+## Impact
+<!-- How does this affect users? -->
+- [ ] Critical - Causes errors if followed
+- [ ] High - Likely to confuse users
+- [ ] Medium - Could be clearer
+- [ ] Low - Minor improvement