feat(ui): add defineComponent factory

Signed-off-by: Johan Persson <johanopersson@gmail.com>

packages/ui/src/hooks/useDefinition/defineComponent.ts

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2025 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import type { ComponentConfig } from './types';
+
+export function defineComponent<
+  P extends Record<string, any>,
+  S extends Record<string, string>,
+  const C extends ComponentConfig<P, S>,
+>(config: C): C {
+  return config;
+}