Add DTR entry with number of visible pairs (#52)

* Add DTR entry with number of visible pairs

* Simplify DTR visible pair counter

- Merge the new PairHandlerInvisibleMessage and PairHandlerVisibleDisposedMessage ;
- Leave alone a bunch of messages that were actually unneccessary.

* Match encodings with the rest of the codebase

* Make the DTR entry opt-in and add explanations

* More reliable publishing of PairHandlerVisible/Invisible

* Simplify things for DTR

* Rework async

MareSynchronos/UI/SettingsUi.cs

@@ -515,6 +515,7 @@ public class SettingsUi : WindowMediatorSubscriberBase
         var profileDelay = _configService.Current.ProfileDelay;
         var profileOnRight = _configService.Current.ProfilePopoutRight;
         var enableRightClickMenu = _configService.Current.EnableRightClickMenus;
+        var enableDtrEntry = _configService.Current.EnableDtrEntry;
         var preferNotesInsteadOfName = _configService.Current.PreferNotesOverNamesForVisible;
 
         if (ImGui.Checkbox("Enable Game Right Click Menu Entries", ref enableRightClickMenu))
@@ -524,6 +525,13 @@ public class SettingsUi : WindowMediatorSubscriberBase
         }
         UiSharedService.DrawHelpText("This will add Mare related right click menu entries in the game UI on paired players.");
 
+        if (ImGui.Checkbox("Display status and visible pair count in Server Info Bar", ref enableDtrEntry))
+        {
+            _configService.Current.EnableDtrEntry = enableDtrEntry;
+            _configService.Save();
+        }
+        UiSharedService.DrawHelpText("This will add Mare connection status and visible pair count in the Server Info Bar.\nYou can further configure this through your Dalamud Settings.");
+
         if (ImGui.Checkbox("Show separate Visible group", ref showVisibleSeparate))
         {
             _configService.Current.ShowVisibleUsersSeparately = showVisibleSeparate;