Resolve #3192923 "Assign media to"

Closes #3192923

config/schema/groupmedia.schema.yml

@@ -11,3 +11,19 @@ groupmedia.settings:
       sequence:
         type: string
         label: 'Media bundle name'
+
+action.configuration.assign_media_to_group:
+  type: mapping
+  label: 'Assign media to Group'
+  mapping:
+    group_id:
+      type: integer
+      label: 'The ID of the group to add media to'
+
+action.configuration.remove_media_from_group:
+  type: mapping
+  label: 'Remove media from Group'
+  mapping:
+    group_id:
+      type: integer
+      label: 'The ID of the group to remove media from'