* feat: add opencode-skill-loader with 4-source priority system
- Create new opencode-skill-loader feature module independent from Claude Code
- Support 4 source paths with priority: opencode-project > project > opencode > user
- .opencode/skill/ (opencode-project)
- .claude/skills/ (project)
- ~/.config/opencode/skill/ (opencode)
- ~/.claude/skills/ (user)
- Support both SKILL.md and {SKILLNAME}.md file patterns
- Maintain path awareness for file references (@path syntax)
* feat: integrate opencode-skill-loader into main plugin
- Import and use new skill loader functions
- Load skills from all 4 sources and merge into config.command
- Also merge pluginComponents.skills (previously loaded but never used)
* feat: add skill discovery to slashcommand tool
- Import and use discoverAllSkills from opencode-skill-loader
- Display skills alongside commands in tool description and execution
- Update formatCommandList to handle combined commands and skills
* refactor: remove old claude-code-skill-loader
- Delete src/features/claude-code-skill-loader/ directory (was never integrated into main plugin)
- Update plugin loader import to use new opencode-skill-loader types
* docs: update AGENTS.md for new skill loader
- Update structure to show opencode-skill-loader instead of claude-code-skill-loader
- Update Skills priority order to include all 4 sources
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Co-authored-by: sisyphus-dev-ai <sisyphus-dev-ai@users.noreply.github.com>