editor improvements

* add callout, youtube embed, image, video, table, detail, math
* fix attachments module
* other fixes

packages/editor-ext/src/lib/callout/utils.ts

@@ -0,0 +1,8 @@
+export type CalloutType = "default" | "info" | "success" | "warning" | "danger";
+const validCalloutTypes = ["default", "info", "success", "warning", "danger"];
+
+export function getValidCalloutType(value: string): string {
+  if (value) {
+    return validCalloutTypes.includes(value) ? value : "info";
+  }
+}