chore: update Claude Code settings and enable voltagent plugins

Add fetch and sequentialthinking MCP servers to allowed list, and enable
voltagent dev-exp and lang subagent plugins.

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

.claude/settings.json

@@ -0,0 +1,6 @@
+{
+  "enabledPlugins": {
+    "voltagent-dev-exp@voltagent-subagents": true,
+    "voltagent-lang@voltagent-subagents": true
+  }
+}

.claude/settings.local.json

@@ -4,6 +4,13 @@
     "flux",
     "playwright",
     "github",
-    "pgtuner"
+    "pgtuner",
+    "fetch",
+    "sequentialthinking"
+  ],
+  "permissions": {
+    "allow": [
+      "Bash(git add .claude/settings.local.json .claude/settings.json && git commit -m \"$\\(cat <<'EOF'\nchore: update Claude Code settings and enable voltagent plugins\n\nAdd fetch and sequentialthinking MCP servers to allowed list, and enable\nvoltagent dev-exp and lang subagent plugins.\n\nCo-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>\nEOF\n\\)\" && git status)"
     ]
   }
+}