feat: import 35 skills from affaan-m/everything-claude-code

- Add 9 agent skills (cc-agent-*)
- Add 10 command skills (cc-cmd-*)
- Add 8 skill files (cc-skill-*)
- Add 8 rule skills (cc-rule-*)
- Update README.md skill count from 225 to 260
- Add new skills to Full Skill Registry
- Add credit to affaan-m in Credits section
- Regenerate skills_index.json

Source: https://github.com/affaan-m/everything-claude-code
Author attribution: affaan-m, version 1.0

skills/cc-cmd-code-review/SKILL.md

@@ -0,0 +1,47 @@
+---
+name: cc-cmd-code-review
+description: Code Review
+author: affaan-m
+version: "1.0"
+---
+
+# Code Review
+
+Comprehensive security and quality review of uncommitted changes:
+
+1. Get changed files: git diff --name-only HEAD
+
+2. For each changed file, check for:
+
+**Security Issues (CRITICAL):**
+- Hardcoded credentials, API keys, tokens
+- SQL injection vulnerabilities
+- XSS vulnerabilities  
+- Missing input validation
+- Insecure dependencies
+- Path traversal risks
+
+**Code Quality (HIGH):**
+- Functions > 50 lines
+- Files > 800 lines
+- Nesting depth > 4 levels
+- Missing error handling
+- console.log statements
+- TODO/FIXME comments
+- Missing JSDoc for public APIs
+
+**Best Practices (MEDIUM):**
+- Mutation patterns (use immutable instead)
+- Emoji usage in code/comments
+- Missing tests for new code
+- Accessibility issues (a11y)
+
+3. Generate report with:
+   - Severity: CRITICAL, HIGH, MEDIUM, LOW
+   - File location and line numbers
+   - Issue description
+   - Suggested fix
+
+4. Block commit if CRITICAL or HIGH issues found
+
+Never approve code with security vulnerabilities!