UBERF-5595: set up attachments sizes (#4746)

Signed-off-by: Kristina Fefelova <kristin.fefelova@gmail.com>

plugins/attachment/src/index.ts

@@ -33,6 +33,30 @@ export interface Attachment extends AttachedDoc {
   pinned?: boolean // If defined and true, will be shown in top of attachments collection
 
   readonly?: boolean // If readonly, user will not be able to remove or modify this attachment
+
+  metadata?: AttachmentMetadata
+}
+
+/**
+ * @public
+ */
+export type AttachmentMetadata = ImageMetadata | VideoMetadata
+
+/**
+ * @public
+ */
+export interface ImageMetadata {
+  originalWidth: number
+  originalHeight: number
+  pixelRatio: number
+}
+
+/**
+ * @public
+ */
+export interface VideoMetadata {
+  originalWidth: number
+  originalHeight: number
 }
 
 /**