## Summary
- Replace the agent search mechanism with a new skills-based system
- Add a `skills` module with predefined skill definitions that the AI
can load on demand
- Remove specialized agents (workflow-builder, data-manipulator,
dashboard-builder, metadata-builder, researcher), keeping only the
helper agent
- Add `recordReferences` to workflow creation tool for chip linking in
the UI
## Changes
### New Skills Module
- `skill-definitions.ts` - Contains 5 skill definitions with detailed
instructions
- `skills.service.ts` - Service to get skills by name
- `load-skill.tool.ts` - Tool for AI to load skills explicitly
### Removed
- `agent-search.tool.ts` - Replaced by skill loading
- Specialized agent definitions (converted to skills)
### Updated
- Chat execution now shows skill catalog in system prompt
- Workflow creation returns `recordReferences` for UI linking
## Test plan
- [ ] Verify AI can load skills using `load_skill` tool
- [ ] Verify skill content is returned correctly
- [ ] Verify workflow creation shows clickable chip in chat
- [ ] Verify helper agent still works
