feat: Implement rest API endpoint to delete user

packages/backend/src/controllers/api/v1/admin/users/delete-user.js

@@ -0,0 +1,10 @@
+import User from '../../../../../models/user.js';
+
+export default async (request, response) => {
+  const id = request.params.userId;
+
+  const user = await User.query().findById(id).throwIfNotFound();
+  await user.softRemove();
+
+  response.status(204).end();
+};