chore: update .gitignore and improve coding standards documentation

- Added .cursor/sessions/* to .gitignore to prevent session files from being tracked.
- Enhanced coding standards in SKILL.md by adding semicolons to TypeScript examples for consistency.
- Improved formatting in continuous learning, detail layout, and other SKILL.md files for better readability.

These changes aim to streamline development processes and maintain code quality across the project.

.cursor/commands/refactor-clean.md

@@ -3,6 +3,7 @@
 Safely identify and remove dead code with test verification:
 
 1. Run dead code analysis tools:
+
    - knip: Find unused exports and files
    - depcheck: Find unused dependencies
    - ts-prune: Find unused TypeScript exports
@@ -10,6 +11,7 @@ Safely identify and remove dead code with test verification:
 2. Generate comprehensive report in .reports/dead-code-analysis.md
 
 3. Categorize findings by severity:
+
    - SAFE: Test files, unused utilities
    - CAUTION: API routes, components
    - DANGER: Config files, main entry points
@@ -17,6 +19,7 @@ Safely identify and remove dead code with test verification:
 4. Propose safe deletions only
 
 5. Before each deletion:
+
    - Run full test suite
    - Verify tests pass
    - Apply change