feature(#22): this commit introduces the schemes for retrieving secrets from a realm

Author: https-richardy

Applications/Backend/Source/HttpsRichardy.Federation.Application/Payloads/Secret/FetchRealmSecretsParameters.cs

@@ -0,0 +1,7 @@
+namespace HttpsRichardy.Federation.Application.Payloads.Secret;
+
+public sealed record FetchRealmSecretsParameters :
+    IDispatchable<Result<IReadOnlyCollection<SecretScheme>>>
+{
+    public string RealmId { get; init; } = default!;
+}