seperate redux ui impl into FrontendCore project

Il2CppInspector.Redux.FrontendCore/LoadingSession.cs

@@ -0,0 +1,23 @@
+namespace Il2CppInspector.Redux.FrontendCore;
+
+public class LoadingSession : IAsyncDisposable
+{
+    private readonly UiClient _client;
+
+    private LoadingSession(UiClient client)
+    {
+        _client = client;
+    }
+
+    public static async Task<LoadingSession> Start(UiClient client)
+    {
+        await client.BeginLoading();
+        return new LoadingSession(client);
+    }
+
+    public async ValueTask DisposeAsync()
+    {
+        await _client.FinishLoading();
+        GC.SuppressFinalize(this);
+    }
+}