Qt6 (#669)

* update qt6 upgrade progress

* add flawed addition for QRenderTarget and link needed libs

* update to better logging format

* move many assets and qml files into qrc

* get rid of deprecation messages

* remove additional deprecation notices

* make Qt6 finally render on desktop with some progress on vr

* initialize QRhi with QQuickRenderControl

* use default values to stop SegFaults

* fix compilation on windows

* add windows files for aiding in running exe

* fix formatting of testing qt.conf

* first attempt on using textures instead of files in AudioTabController

* Fix public/private access issue

---------

Co-authored-by: RTUnreal <unreal@rtinf.net>

src/res/qml/audio_page/device_selector/MicVolumeSlider.qml

@@ -89,7 +89,7 @@ ColumnLayout {
     }
     Connections {
         target: AudioTabController
-        onMicDeviceIndexChanged: {
+        function onMicDeviceIndexChanged() {
             if (index < 0) {
                 audioMicVolumeMinusButton.enabled = false
                 audioMicVolumeSlider.enabled = false
@@ -102,16 +102,16 @@ ColumnLayout {
                 audioMicMuteToggle.enabled = true
             }
         }
-        onMicVolumeChanged: {
+        function onMicVolumeChanged() {
             audioMicVolumeSlider.value = AudioTabController.micVolume
         }
-        onMicMutedChanged: {
+        function onMicMutedChanged() {
             audioMicMuteToggle.checked = AudioTabController.micMuted
         }
-        onPlaybackDeviceListChanged: {
+        function onPlaybackDeviceListChanged() {
 
         }
-        onRecordingDeviceListChanged: {
+        function onRecordingDeviceListChanged() {
             if (AudioTabController.micDeviceIndex < 0) {
                 audioMicVolumeMinusButton.enabled = false
                 audioMicVolumeSlider.enabled = false