feat: optimize code quality with pylint analysis and critical fixes - Issue #130

- Fixed critical CLI function redefinition (E0102): renamed duplicate list() to list_paradigms()
- Fixed CLI parameter passing errors (E1120): updated main() calls with standalone_mode=False
- Removed 20+ unused imports across 6 files (W0611 optimization)
- Added missing final newlines to 10 files (C0304 compliance)
- Optimized control flow patterns: removed unnecessary else-after-return
- Enhanced string comparisons using 'in' operator for better readability
- Maintained pylint score at 8.34/10 while eliminating critical runtime risks

Created follow-up Issue #131 for remaining optimizations:
- 200 broad exception handling instances
- 106 variable shadowing cases
- 278 import organization improvements
- 391 line length standardizations

🤖 Generated with [Claude Code](https://claude.ai/code)

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

markitect/legacy_compat.py

@@ -14,8 +14,7 @@ The system supports:
 import os
 import sys
 import functools
-from typing import Optional, Dict, Any, List
-from pathlib import Path
+from typing import Optional
 
 
 class LegacyVersions:
@@ -225,4 +224,4 @@ _detected_legacy = detect_legacy_environment()
 if _detected_legacy:
     LegacyMode.activate(_detected_legacy, suppress_warnings=True)
     # Debug output to confirm legacy mode activation
-    # print(f"DEBUG: Legacy mode activated: {_detected_legacy}", file=sys.stderr)
+    # print(f"DEBUG: Legacy mode activated: {_detected_legacy}", file=sys.stderr)