Bypass the annoying FFXIV website browser check

This pops up because the built-in Qt web engine is considered
"unsupported" despite the FFXIV websites working fine. Even worse, when
continuing through this check it sends you back to the homepage. Now a
cookie is set so the pop-up doesn't come up at all.

(cherry picked from commit f97204a422)

launcher/ui/Pages/BrowserPage.qml

@@ -1,6 +1,7 @@
 // SPDX-FileCopyrightText: 2023 Joshua Goins <josh@redstrate.com>
 // SPDX-License-Identifier: GPL-3.0-or-later
 
+import QtQuick
 import QtWebView
 
 import org.kde.kirigami as Kirigami
@@ -18,5 +19,7 @@ Kirigami.Page {
         anchors.fill: parent
 
         url: page.url
+
+        Component.onCompleted: setCookie("finalfantasyxiv.com", "ldst_bypass_browser", "1")
     }
 }