Remove .claude/ from tracking, add to .gitignore

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

.claude/settings.local.json

@@ -1,9 +0,0 @@
-{
-  "permissions": {
-    "allow": [
-      "WebFetch(domain:raw.githubusercontent.com)",
-      "WebSearch",
-      "WebFetch(domain:api.github.com)"
-    ]
-  }
-}

.gitignore

@@ -14,9 +14,10 @@ build/
 venv/
 env/
 
-# IDE
+# IDE / tools
 .vscode/
 .idea/
+.claude/
 *.swp
 *.swo