add scalar api reference

src/infrastructure/common/helpers/api-schema.ts

@@ -0,0 +1,19 @@
+type Constructor<T = object> = new (...args: any[]) => T
+type Wrapper<T = object> = { new (): T & any; prototype: T }
+type DecoratorOptions = { name: string }
+type ApiSchemaDecorator = <T extends Constructor>(
+  options: DecoratorOptions
+) => (constructor: T) => Wrapper<T>
+
+export const ApiSchema: ApiSchemaDecorator = ({ name }) => {
+  return constructor => {
+    const wrapper = class extends constructor {}
+
+    Object.defineProperty(wrapper, 'name', {
+      value: name,
+      writable: false,
+    })
+
+    return wrapper
+  }
+}