docs(GeminiCLI): add example mcp setup config

Author: stickerdaniel

.gemini/settings.json

@@ -0,0 +1,7 @@
+{
+  "mcpServers": {
+    "linkedin-mcp-server": {
+        "httpUrl": "http://127.0.0.1:8000/mcp"
+    }
+  }
+}