Added clip creation support 🎬 (#2271)

You can create clips with `/clip` command, `Alt+X` keybind or `Create a clip` option in split header's context menu. This requires a new authentication scope so re-authentication will be required to use it.

Co-authored-by: Leon Richardt <leon.richardt@gmail.com>
Co-authored-by: pajlada <rasmus.karlsson@pajlada.com>

src/widgets/helper/ChannelView.cpp

@@ -2083,6 +2083,10 @@ void ChannelView::handleLinkClick(QMouseEvent *event, const Link &link,
             }
         }
         break;
+        case Link::CopyToClipboard: {
+            crossPlatformCopy(link.value);
+        }
+        break;
         case Link::Reconnect: {
             this->underlyingChannel_.get()->reconnect();
         }