Initialize prosody-list-rooms button.

shared/lib/types.ts

@@ -1,5 +1,21 @@
 type ChatType = 'disabled' | 'builtin-prosody' | 'builtin-converse' | 'external-uri'
 
-export {
-  ChatType
+interface ProsodyListRoomsResultError {
+  ok: false
+  error: string
+}
+
+interface ProsodyListRoomsResultSuccess {
+  ok: true
+  rooms: Array<{
+    name: string
+    href: string
+  }>
+}
+
+type ProsodyListRoomsResult = ProsodyListRoomsResultError | ProsodyListRoomsResultSuccess
+
+export {
+  ChatType,
+  ProsodyListRoomsResult
 }