feat(api): add create user invitation endpoint

packages/backend/src/controllers/api/v1/user-invitations/create-user-invitation.ee.js

@@ -0,0 +1,23 @@
+import { renderObject } from '../../../../helpers/renderer.js';
+import User from '../../../../models/user.js';
+
+export default async (request, response) => {
+  const user = await User.query().insertAndFetch(userParams(request));
+  await user.sendInvitationEmail();
+
+  renderObject(response, user, {
+    status: 201,
+    serializer: 'PublicUserInvitation',
+  });
+};
+
+const userParams = (request) => {
+  const { fullName, email, roleId } = request.body;
+
+  return {
+    fullName,
+    status: 'invited',
+    email: email?.toLowerCase(),
+    roleId,
+  };
+};