[Glitch] Add automatic notification polling for grouped notifications

Port d67e11733e to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/api/notifications.ts

@@ -4,6 +4,7 @@ import type { ApiNotificationGroupsResultJSON } from 'flavours/glitch/api_types/
 export const apiFetchNotifications = async (params?: {
   exclude_types?: string[];
   max_id?: string;
+  since_id?: string;
 }) => {
   const response = await api().request<ApiNotificationGroupsResultJSON>({
     method: 'GET',