feat: initialize project template structure

- Add README with agent workflow guidance
- Create agent role instructions (HA_Coder)
- Add Issue and Pull Request templates
- Establish standard folder structure

.gitea/ISSUE_TEMPLATE/feature.md

@@ -0,0 +1,22 @@
+---
+name: Feature Request
+about: Suggest a new feature for this project
+title: '[FEATURE] '
+labels: feature
+---
+
+## Description
+
+## Motivation
+
+## Proposed Solution
+
+## Acceptance Criteria
+
+- [ ] 
+- [ ] 
+- [ ] 
+
+## Related Planning
+
+Reference any related issues or plans from the `core-planning` repository.