A:增加全局JSON配置，并增加统一的序列化和反序列化

src/NetVizor.Backend/Common/AppConfig.cs

@@ -36,4 +36,5 @@ public sealed class AppConfig
     /// 订阅字符串
     /// </summary>
     public static readonly string ApplicationInfoSubscribe= "ApplicationInfo";
+    public static readonly string ProcessInfoSubscribe= "ProcessInfo";
 }

src/NetVizor.Backend/Common/Utils/JsonHelper.cs

@@ -0,0 +1,18 @@
+using System.Text.Json;
+
+namespace Common.Utils;
+
+public static class JsonHelper
+{
+    public static readonly JsonSerializerOptions CamelCaseOptions = new JsonSerializerOptions
+    {
+        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+        WriteIndented = true
+    };
+
+    public static string ToJson<T>(T value) =>
+        JsonSerializer.Serialize(value, CamelCaseOptions);
+
+    public static T? FromJson<T>(string json) =>
+        JsonSerializer.Deserialize<T>(json, CamelCaseOptions);
+}