docs(api): add MCP server to sidebar navigation

Author: izadoesdev

apps/docs/components/sidebar-content.tsx

@@ -270,6 +270,11 @@ export const contents: SidebarSection[] = [
 						title: "Authentication",
 						href: "/docs/api/authentication",
 					},
+					{
+						title: "MCP Server",
+						href: "/docs/api/mcp",
+						isNew: true,
+					},
 					{
 						title: "API Keys",
 						href: "/docs/api-keys",