refactor(IAsymmetricKey): Umwandlung von RsaSecurityKey in SecurityKey zur besseren Abstraktion.

- RSAEncryptionPadding entfernen
 - Pem als Inhalt Content

DigitalData.Core.Abstractions/Security/IAsymmetricKey.cs

@@ -5,14 +5,12 @@ namespace DigitalData.Core.Abstractions.Security
 {
     public interface IAsymmetricKey : IUniqueSecurityContext
     {
-        public string Pem { get; init; }
-
-        public RSAEncryptionPadding Padding { get; init; }
+        public string Content { get; init; }
         
         public new string Issuer { get; init; }
 
         public new string Audience { get; init; }
 
-        public RsaSecurityKey RsaSecurityKey { get; }
+        public SecurityKey SecurityKey { get; }
     }
 }