WebUI: switch to lightweight clipboard library

The new library [1] will opt to the modern Clipboard API [2] when it is available. It will
fallback to the old method otherwise.
The new library is also smaller and without any bloat.

Note that the line `module.exports` is required to be removed/commented out. This is the only
patch required.

[1] https://github.com/feross/clipboard-copy
[2] https://developer.mozilla.org/en-US/docs/Web/API/Clipboard_API

PR #22792.

src/webui/www/private/scripts/prop-trackers.js

@@ -248,10 +248,9 @@ window.qBittorrent.PropTrackers ??= (() => {
         torrentTrackersTable.clear();
     };
 
-    new ClipboardJS("#CopyTrackerUrl", {
-        text: (trigger) => {
-            return torrentTrackersTable.selectedRowsIds().join("\n");
-        }
+    document.getElementById("CopyTrackerUrl").addEventListener("click", async (event) => {
+        const text = torrentTrackersTable.selectedRowsIds().join("\n");
+        await clipboardCopy(text);
     });
 
     torrentTrackersTable.setup("torrentTrackersTableDiv", "torrentTrackersTableFixedHeaderDiv", torrentTrackersContextMenu, true);