generic iframe embed (#1234)

apps/client/src/features/editor/components/slash-menu/menu-items.ts

@@ -17,8 +17,8 @@ import {
   IconTable,
   IconTypography,
   IconMenu4,
-  IconCalendar,
-} from "@tabler/icons-react";
+  IconCalendar, IconAppWindow,
+} from '@tabler/icons-react';
 import {
   CommandProps,
   SlashMenuGroupedItemsType,
@@ -357,6 +357,20 @@ const CommandGroups: SlashMenuGroupedItemsType = {
           .run();
       },
     },
+    {
+      title: "Iframe embed",
+      description: "Embed any Iframe",
+      searchTerms: ["iframe"],
+      icon: IconAppWindow,
+      command: ({ editor, range }: CommandProps) => {
+        editor
+          .chain()
+          .focus()
+          .deleteRange(range)
+          .setEmbed({ provider: "iframe" })
+          .run();
+      },
+    },
     {
       title: "Airtable",
       description: "Embed Airtable",