Added three issue templates to improve issue tracking:
- Feature request template for new features and enhancements.
- Bug report template for reporting bugs and unexpected behavior.
- General issue template for issues that don't fit other categories.
Templates follow Gitea best practices with proper frontmatter metadata.
Each template includes clear sections with inline comments to guide users.
Updated CLAUDE.md with issue management and workflow documentation.
Closes#21
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
