NET 8 Upgrade (#687)

* Initial .NET8 Upgrade

* Initial GitHub Actions Cleanup

* Fix Desktop Notifications

* Fix throw warning

* Upgrade vunerable transative nuget packages

* Fix warnings with registry overflow

* Adjust async/await usage for configRepository

* Fix TTS voice name and app auto start

* Install .NET 8 with setup

I regret NSIS

* Remove no longer needed System/MS references (included in dotnet sdk)

* Surpress stackalloc in loop warning, that code scares me.

* Removed unused SharpDX packages

* Ignore WebClient warning, hopefully this project doesn't move past NET 8

* Fixed terrifying code

* GenerateAssemblyInfo

* Trimmed editor config to only silence warning.

* Fix open webpage

* Fix updater

---------

Co-authored-by: DubyaDude <ushafiq141@gmail.com>
Co-authored-by: Natsumi <cmcooper123@hotmail.com>

Dotnet/Update.cs

@@ -32,7 +32,7 @@ namespace VRCX
                 Install();
         }
 
-        public static void Install()
+        private static void Install()
         {
             try
             {
@@ -42,7 +42,9 @@ namespace VRCX
                     StartInfo = new ProcessStartInfo
                     {
                         FileName = VRCX_Setup_Executable,
-                        Arguments = "/S"
+                        Arguments = "/S",
+                        UseShellExecute = true,
+                        WorkingDirectory = Program.AppDataDirectory
                     }
                 };
                 VRCXProcess.Start();