[PM-12727/12737] Adding copy for Add/Edit (#11369)

* add copy for attachments view in the web

* add delete attachment copy on the web

apps/web/src/locales/en/messages.json

@@ -9265,5 +9265,14 @@
   },
   "editAccess": {
     "message": "Edit access"
+  },
+  "addAttachment": {
+    "message": "Add attachment"
+  },
+  "maxFileSizeSansPunctuation": {
+    "message": "Maximum file size is 500 MB"
+  },
+  "permanentlyDeleteAttachmentConfirmation": {
+    "message": "Are you sure you want to permanently delete this attachment?"
   }
 }