Add developer mode option to show RTC connection statistics (#2904)

* Add developer mode option to show RTC connection statistics

* Add note about localization

* Add titles to help explain what the numbers are

* Workaround horizontal scrolling

* Use modal to show detailed stats instead of alert

* Changed styling and fixed fps = 0 (#2916)

(React rendered 0 instead of <Text /> for fps && <Text>{fps}</text>)

---------

Co-authored-by: Timo <16718859+toger5@users.noreply.github.com>

src/settings/settings.ts

@@ -78,6 +78,11 @@ export const showNonMemberTiles = new Setting<boolean>(
 );
 export const debugTileLayout = new Setting("debug-tile-layout", false);
 
+export const showConnectionStats = new Setting<boolean>(
+  "show-connection-stats",
+  false,
+);
+
 export const audioInput = new Setting<string | undefined>(
   "audio-input",
   undefined,