docs: add snippet verification for docs/ pages (#2115)

examples/snippets/servers/resource_templates.py

@@ -0,0 +1,9 @@
+from mcp.server.fastmcp import FastMCP
+
+mcp = FastMCP("Template Example")
+
+
+@mcp.resource("users://{user_id}/profile")
+def get_user_profile(user_id: str) -> str:
+    """Read a specific user's profile. The user_id is extracted from the URI."""
+    return f'{{"user_id": "{user_id}", "name": "User {user_id}"}}'