feat: implement machine key provider

- implement logic for hashing machine key
- extracted interfaces

src/StevanFreeborn.Extensions.Configuration.Secure/Cryptography/MachineIdKeyGenerator.cs

@@ -5,11 +5,6 @@ using Microsoft.Extensions.Logging;
 
 namespace StevanFreeborn.Extensions.Configuration.Secure.Cryptography;
 
-internal interface IMachineIdKeyGenerator
-{
-  string GetId();
-}
-
 internal sealed class MachineIdKeyGenerator : IMachineIdKeyGenerator
 {
   private const string IOPlatformUUID = nameof(IOPlatformUUID);
@@ -111,4 +106,4 @@ internal static partial class LogMessages
       Message = "Using fallback strategy for Machine ID generation."
   )]
   public static partial void LogUsingFallbackStrategy(this ILogger logger);
-}
+}