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/claude-code-safety-net/knip.ts

@@ -0,0 +1,8 @@
+import type { KnipConfig } from 'knip';
+
+const config: KnipConfig = {
+  entry: ['src/index.ts', 'src/bin/cc-safety-net.ts', 'scripts/**/*.ts'],
+  project: ['src/**/*.ts!', 'scripts/**/*.ts!'],
+};
+
+export default config;