- Create new `pkm` directory for Personal Knowledge Management skills
- Move conversation-summary, knowledge-gardener, and research-vault from `personal` to `pkm`
- Add new crit skill for brainstorming with the CRIT framework
- Update skill descriptions for clarity and consistency
- Add audio-product-dsp, grilling, and research-engineering to model-invoked listings
- Update skill paths across README files to reflect new directory structure
- Add deprecated skills README with audio-product-dsp and research-engineering
- Add productivity skills README with grill-me, handoff, writing-great-skills, and grilling
- Move forge-preferences from user-invoked to model-invoked in personal skills
- Add research-vault skill with conversational research workflow and Obsidian packet output
- Add research packet template with Index, Sources, Synthesis, Claims, Questions, Conversation, and Glossaries
- Add personal/README.md listing personal skills
- Reorganize common/README.md paths into personal/ and productivity/ subdirectories