Fix skills not detected due to nested directory structure

[nobita2041]

Summary

• Skills (meeting-intelligence, knowledge-capture, research-documentation, spec-to-implementation) are not recognized by Claude Code after plugin installation
• Root cause: skills are nested under skills/notion/<skill-name>/SKILL.md but Claude Code expects skills/<skill-name>/SKILL.md (one level deep)
• This PR removes the intermediate notion/ namespace directory so all four skills are properly detected
• Commands (commands/) are unaffected and work correctly both before and after this change

Reproduction

1. Install the plugin following the README instructions
2. Restart Claude Code
3. Observe that /Notion:search, /Notion:find, etc. (commands) work
4. Observe that skills like Notion:meeting-intelligence do not appear in the available skills list

Fix

# Before (broken)
skills/
  notion/
    meeting-intelligence/SKILL.md
    knowledge-capture/SKILL.md
    research-documentation/SKILL.md
    spec-to-implementation/SKILL.md

# After (fixed)
skills/
  meeting-intelligence/SKILL.md
  knowledge-capture/SKILL.md
  research-documentation/SKILL.md
  spec-to-implementation/SKILL.md

Verification

After applying the fix and restarting Claude Code, all four skills appear correctly:

• Notion:meeting-intelligence ✅
• Notion:knowledge-capture ✅
• Notion:research-documentation ✅
• Notion:spec-to-implementation ✅

Test plan

• Install plugin with this fix applied
• Restart Claude Code
• Verify all four skills appear in the skills list
• Verify existing commands (/Notion:search, /Notion:find, etc.) still work
• Invoke each skill and confirm it loads the correct SKILL.md content

🤖 Generated with Claude Code