embed ui executable directly into c# assembly

Il2CppInspector.Redux.GUI/UiProcessService.cs

@@ -4,14 +4,39 @@ namespace Il2CppInspector.Redux.GUI;
 
 public class UiProcessService(IHostApplicationLifetime lifetime) : BackgroundService
 {
-    // NOTE: this is not really a good solution for getting people to launch the correct program.
-    private const string UiExecutableName = "./resources/il2cppinspectorredux.exe";
+    // TODO: This needs to be adjusted for multiplatform support
+    private const string UiExecutableName = "il2cppinspectorredux.exe";
 
     private Process? _uiProcess;
+    private string? _uiExectuablePath;
 
     public void LaunchUiProcess(int port)
     {
-        _uiProcess = Process.Start(new ProcessStartInfo(UiExecutableName, [port.ToString()]));
+        _uiExectuablePath ??= ExtractUiExecutable();
+        _uiProcess = Process.Start(new ProcessStartInfo(_uiExectuablePath, [port.ToString()]));
+    }
+
+    private static string ExtractUiExecutable()
+    {
+        try
+        {
+            using var executable =
+                typeof(UiProcessService).Assembly.GetManifestResourceStream(
+                    $"{typeof(UiProcessService).Namespace!}.{UiExecutableName}");
+            if (executable == null)
+                throw new FileNotFoundException("Failed to open resource as stream.");
+
+            var tempDir = Directory.CreateTempSubdirectory("il2cppinspectorredux-ui");
+            var uiExePath = Path.Join(tempDir.FullName, UiExecutableName);
+
+            using var fs = File.Create(uiExePath);
+            executable.CopyTo(fs);
+            return uiExePath;
+        }
+        catch (Exception ex)
+        {
+            throw new InvalidOperationException($"Failed to find embedded UI executable: {ex}");
+        }
     }
 
     protected override async Task ExecuteAsync(CancellationToken stoppingToken)
@@ -28,6 +53,9 @@ public class UiProcessService(IHostApplicationLifetime lifetime) : BackgroundSer
         if (_uiProcess is { HasExited: false }) 
             _uiProcess.Kill();
 
+        if (_uiExectuablePath != null)
+            File.Delete(_uiExectuablePath);
+
         return base.StopAsync(cancellationToken);
     }
 }