add context response type

types.d.ts

@@ -6,6 +6,11 @@ export interface Notification {
   created_at: string;
 }
 
+export interface ContextResponse {
+  ancestors: Notification[];
+  descendents: Notification[];
+}
+
 export interface NewStatusBody {
   content_type: "application/json" | "text/markdown";
   in_reply_to_id?: string;