implement appcenter and minor fix

src/AppCenterSDK/Models/PageLog.cs

@@ -0,0 +1,17 @@
+using Newtonsoft.Json;
+
+namespace YaeAchievement.AppCenterSDK.Models; 
+
+[JsonObject(JsonIdentifier)]
+public class PageLog : LogWithProperties {
+    
+    public const string JsonIdentifier = "page";
+
+    public PageLog(string name) {
+        Name = name;
+    }
+
+    [JsonProperty(PropertyName = "name")]
+    public string Name { get; set; }
+    
+}