music.queue: add total length

src/modules/music.js

@@ -652,13 +652,20 @@ command.callback = async function (msg, line) {
         nextTrack += item.length;
       }
 
+      let totalLength = 0;
+      for (const item of queue) {
+        totalLength += item.length;
+      }
+
       return {
         embed: {
           title: ":inbox_tray: Currently Queued",
           color: 0x0088cc,
           fields,
           footer: {
-            text: queue.length > 9 ? `Showing 9/${queue.length} items` : "",
+            text:
+              (queue.length > 9 ? `Showing 9/${queue.length} items | ` : "") +
+              `Total length: ${formatTime(totalLength)}`,
           },
         },
       };