chore(claude): setup github auth

.claude/settings.local.json.example

@@ -0,0 +1,5 @@
+{
+  "env": {
+    "GH_TOKEN": ""
+  }
+}

.mcp.json

@@ -0,0 +1,11 @@
+{
+  "mcpServers": {
+    "github": {
+      "type": "http",
+      "url": "https://api.githubcopilot.com/mcp",
+      "headers": {
+        "Authorization": "Bearer ${GH_TOKEN}"
+      }
+    }
+  }
+}