Add comprehensive CLI path tests and fix remaining issues

Added 18 new tests covering all aspects of CLI path corrections:
- Docstring/usage examples (5 tests)
- Print statements (3 tests)
- Subprocess calls (1 test)
- Documentation files (3 tests)
- Help output functionality (2 tests)
- Script executability (4 tests)

All tests verify that:
1. Scripts can be executed with cli/ prefix
2. Usage examples show correct paths
3. Print statements guide users correctly
4. No old hardcoded paths remain
5. Documentation is consistent

Fixed additional issues found by tests:
- cli/enhance_skill.py: Fixed 4 more occurrences in docstring and error message
- cli/package_skill.py: Fixed 1 occurrence in help epilog

Test Results:
- Total tests: 118 (100 existing + 18 new)
- All tests passing: 100%
- Coverage: CLI paths, scraper features, config validation, integration, MCP server

Related: PR #145

cli/enhance_skill.py

@@ -4,9 +4,9 @@ SKILL.md Enhancement Script
 Uses Claude API to improve SKILL.md by analyzing reference documentation.
 
 Usage:
-    python3 enhance_skill.py output/steam-inventory/
-    python3 enhance_skill.py output/react/
-    python3 enhance_skill.py output/godot/ --api-key YOUR_API_KEY
+    python3 cli/enhance_skill.py output/steam-inventory/
+    python3 cli/enhance_skill.py output/react/
+    python3 cli/enhance_skill.py output/godot/ --api-key YOUR_API_KEY
 """
 
 import os
@@ -279,7 +279,7 @@ Examples:
         print("\nSet your API key:")
         print("  export ANTHROPIC_API_KEY=sk-ant-...")
         print("Or provide it directly:")
-        print(f"  python3 enhance_skill.py {skill_dir} --api-key sk-ant-...")
+        print(f"  python3 cli/enhance_skill.py {skill_dir} --api-key sk-ant-...")
         sys.exit(1)
     except Exception as e:
         print(f"❌ Unexpected error: {e}")