📚 Update development cycle documentation and add placeholder tests

packages/editor-ui/tests/unit/example.spec.ts

@@ -1,12 +0,0 @@
-// import { shallowMount } from '@vue/test-utils';
-// import HelloWorld from '@/components/HelloWorld.vue';
-
-// describe('HelloWorld.vue', () => {
-//   it('renders props.msg when passed', () => {
-//     const msg = 'new message';
-//     const wrapper = shallowMount(HelloWorld, {
-//       propsData: { msg }
-//     });
-//     expect(wrapper.text()).toMatch(msg);
-//   });
-// });

packages/editor-ui/tests/unit/placeholder.spec.ts

@@ -0,0 +1,5 @@
+describe('Placeholder.vue', () => {
+	it('example', () => {
+		expect(1 + 1).toEqual(2);
+	});
+});