create game-side .dll (initial commit)

AimeNet/AppJsonSerializerContext.cs

@@ -0,0 +1,15 @@
+using System.Text.Json.Serialization;
+
+namespace AimeNet;
+
+public record SystemState(
+    [property: JsonPropertyName("api_ver")] int ApiVersion,
+    [property: JsonPropertyName("server_name")] string ServerName);
+
+public record CardReadRequest(
+    [property: JsonPropertyName("card_id")] string MatrixCode);
+
+[JsonSerializable(typeof(SystemState))]
+[JsonSerializable(typeof(CardReadRequest))]
+[JsonSourceGenerationOptions(WriteIndented = true)]
+public partial class AppJsonSerializerContext : JsonSerializerContext;