Reorganize: Move all skills to skills/ folder

- Created skills/ directory
- Moved 272 skills to skills/ subfolder
- Kept agents/ at root level
- Kept installation scripts and docs at root level

Repository structure:
- skills/           - All 272 skills from skills.sh
- agents/           - Agent definitions
- *.sh, *.ps1       - Installation scripts
- README.md, etc.   - Documentation

Co-Authored-By: Claude <noreply@anthropic.com>

skills/plugins/marketplaces/design-plugins/design-and-refine/commands/cleanup.md

@@ -0,0 +1,47 @@
+---
+description: Remove all temporary design lab files created during a design-and-refine session
+---
+
+# Cleanup Command
+
+Manually clean up all temporary files created during a design-and-refine session.
+
+## Usage
+
+```
+/design-and-refine:cleanup
+```
+
+## What This Does
+
+Removes all temporary files and directories created during design exploration:
+
+1. **`.claude-design/`** - The main temporary directory containing:
+   - Design lab variants
+   - Preview files
+   - Design brief JSON
+   - Run logs
+
+2. **Temporary routes:**
+   - `app/__design_lab/` (Next.js App Router)
+   - `app/__design_preview/` (Next.js App Router)
+   - `pages/__design_lab.tsx` (Next.js Pages Router)
+   - `pages/__design_preview.tsx` (Next.js Pages Router)
+
+3. **Any App.tsx modifications** (for Vite projects without routers)
+
+## Instructions
+
+When this command is invoked:
+
+1. Check if `.claude-design/` directory exists
+2. If it exists, list the contents and ask for confirmation before deleting
+3. Check for temporary route files in common locations
+4. Delete confirmed files
+5. Report what was deleted
+
+**Safety rules:**
+- ONLY delete files inside `.claude-design/`
+- ONLY delete route files that match the plugin's naming pattern (`__design_lab`, `__design_preview`)
+- Always confirm with the user before deleting
+- Never delete user-authored files