feat: Update how messages load and sync, allow plugins to import messages

toju-app/src/app/domains/chat/feature/chat-messages/chat-messages.component.html

@@ -11,6 +11,8 @@
     [isAdmin]="isAdmin()"
     [bottomPadding]="composerBottomPadding()"
     [conversationKey]="conversationKey()"
+    [loadingOlder]="loadingOlder()"
+    [conversationExhausted]="conversationExhausted()"
     (replyRequested)="setReplyTo($event)"
     (deleteRequested)="handleDeleteRequested($event)"
     (editSaved)="handleEditSaved($event)"
@@ -20,6 +22,7 @@
     (imageOpened)="openLightbox($event)"
     (imageContextMenuRequested)="openImageContextMenu($event)"
     (embedRemoved)="handleEmbedRemoved($event)"
+    (loadOlderRequested)="handleLoadOlderRequested($event)"
   />
 
   <div