feat: use new async component definition

- fix see: https://v3.vuejs.org/guide/migration/async-components.html
- put async editor in separate component

src/components/input/AsyncEditor.js

@@ -0,0 +1,12 @@
+import { defineAsyncComponent } from 'vue'
+import ErrorComponent from '@/components/misc/error.vue'
+import LoadingComponent from '@/components/misc/loading.vue'
+
+const Editor = () => import('@/components/input/editor.vue')
+
+export default defineAsyncComponent({
+	loader: Editor,
+	loadingComponent: LoadingComponent,
+	errorComponent: ErrorComponent,
+	timeout: 60000,
+})