chore: ignore Claude Code local settings file in docusaurus

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: stephanj

docusaurus/.gitignore

@@ -19,4 +19,7 @@ npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
 
-.clever.json
+.clever.json
+
+# Claude Code local settings
+.claude/settings.local.json