fix: handle errors from Iframely

shared/types.ts

@@ -225,5 +225,10 @@ export type Unfurl<T = OEmbedType> = {
   meta?: Record<string, string>;
 };
 
+export type IframelyErrorResponse = {
+  status: number;
+  error: string;
+};
+
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 export type ProsemirrorData = Record<string, any>;