Added Chobit integration. Updated tests.

JSMR.Tests/Http/FakeHttpMessageHandler.cs

@@ -0,0 +1,9 @@
+namespace JSMR.Tests.Http;
+
+internal sealed class FakeHttpMessageHandler(Func<HttpRequestMessage, HttpResponseMessage> handler) : HttpMessageHandler
+{
+    protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
+    {
+        return Task.FromResult(handler(request));
+    }
+}