core: Add show_topic_info function to show TopicInfoView pop up menu.

Co-authored-by: Shivam Deotarse <srdeotarse@gmail.com>

Author: rsashank

zulipterminal/core.py

@@ -44,6 +44,7 @@
     PopUpConfirmationView,
     StreamInfoView,
     StreamMembersView,
+    TopicInfoView,
     UserInfoView,
 )
 from zulipterminal.version import ZT_VERSION
@@ -293,6 +294,10 @@ def show_stream_info(self, stream_id: int) -> None:
         show_stream_view = StreamInfoView(self, stream_id)
         self.show_pop_up(show_stream_view, "area:stream")
 
+    def show_topic_info(self, stream_id: int, topic_name: str) -> None:
+        show_topic_view = TopicInfoView(self, stream_id, topic_name)
+        self.show_pop_up(show_topic_view, "area:topic")
+
     def show_stream_members(self, stream_id: int) -> None:
         stream_members_view = StreamMembersView(self, stream_id)
         self.show_pop_up(stream_members_view, "area:stream")