Add Node.js patterns to .gitignore

- Ignore node_modules directory
- Ignore npm/yarn log files
- Ignore package-lock.json

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -51,6 +51,13 @@ $RECYCLE.BIN/
 *.lock
 *.log
 
+# Node.js
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+package-lock.json
+
 # AI Agents
 .agents
 .claude/skills