add claude code settings and update gitignore

Enable Claude Code plugins for project development workflow and track
settings.json while keeping local settings ignored.

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.claude/settings.json

@@ -0,0 +1,12 @@
+{
+  "enabledPlugins": {
+    "frontend-design@claude-plugins-official": true,
+    "feature-dev@claude-plugins-official": true,
+    "code-review@claude-plugins-official": true,
+    "commit-commands@claude-plugins-official": true,
+    "security-guidance@claude-plugins-official": true,
+    "typescript-lsp@claude-plugins-official": true,
+    "pr-review-toolkit@claude-plugins-official": true
+  },
+  "outputStyle": "Explanatory"
+}

.gitignore

@@ -65,5 +65,4 @@ random/
 **/fastlane/metadata/review_information
 
 # ai
-.claude
-.cursor
+.claude/settings.local.json