Reworked encryption to use less heap allocated buffers for secrets.

Also some work on plugin system.

IdentityShroud.Api/Apis/Mappers/ClientMapper.cs

@@ -6,6 +6,9 @@ namespace IdentityShroud.Api.Mappers;
 [Mapper]
 public partial class ClientMapper
 {
+    // skipping secret as we do not have the DEK
     [MapperIgnoreSource(nameof(Client.Secrets))]
+    [MapperIgnoreTarget(nameof(ClientRepresentation.Secret))]
     public partial ClientRepresentation ToDto(Client client);
+
 }