分离玩家信息插件，以及更新检测

Utils/Network.cs

@@ -0,0 +1,27 @@
+using System.Net.Http;
+using System.Text.Json;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Web;
+
+namespace AnotherReplayReader.Utils
+{
+    public static class Network
+    {
+        public static readonly JsonSerializerOptions CommonJsonOptions = new()
+        {
+            PropertyNamingPolicy = JsonNamingPolicy.CamelCase
+        };
+
+        public static string UrlEncode(string text) => HttpUtility.UrlEncode(text);
+
+        public static async Task<T?> HttpGetJson<T>(string url,
+                                                    CancellationToken cancelToken = default)
+        {
+            using var client = new HttpClient();
+            using var response = await client.GetAsync(url, cancelToken).ConfigureAwait(false);
+            using var stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
+            return await JsonSerializer.DeserializeAsync<T>(stream, CommonJsonOptions, cancelToken).ConfigureAwait(false);
+        }
+    }
+}