Support bubble timeline

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

src/utils/features.ts

@@ -265,6 +265,12 @@ const getInstanceFeatures = (instance: Instance) => {
       v.software === GOTOSOCIAL,
     ]),
 
+    /**
+     * Can display a timeline of statuses from instances selected by instance admin.
+     * @see GET /api/v1/timelines/bubble
+     */
+    bubbleTimeline: features.includes('bubble_timeline'),
+
     /**
      * Pleroma chats API.
      * @see {@link https://docs.pleroma.social/backend/development/API/chats/}