feat: introduce json context for AOT serialization support

src/StevanFreeborn.Atproto.IdentityResolver/Json/JsonContext.cs

@@ -0,0 +1,16 @@
+using System.Text.Json.Serialization;
+
+using StevanFreeborn.Atproto.IdentityResolver.Identity;
+using StevanFreeborn.Atproto.IdentityResolver.Retrieval;
+
+namespace StevanFreeborn.Atproto.IdentityResolver.Json;
+
+[JsonSourceGenerationOptions(WriteIndented = true)]
+[JsonSerializable(typeof(DnsQueryResponse))]
+[JsonSerializable(typeof(Answer))]
+[JsonSerializable(typeof(DidDocument))]
+[JsonSerializable(typeof(VerificationMethod))]
+[JsonSerializable(typeof(Service))]
+internal partial class JsonContext : JsonSerializerContext
+{
+}