Add support for ГОСТ Р 34.10 digital signatures

- Implemented the GostKeyValue class for handling public key parameters in ГОСТ Р 34.10 digital signatures.
- Created the GostSignedXml class to manage XML signatures using ГОСТ 34.10, including methods for computing and checking signatures.
- Developed the GostSignedXmlImpl class to encapsulate the signature computation logic and public key retrieval.
- Added specific key value classes for ГОСТ Р 34.10-2001, ГОСТ Р 34.10-2012/256, and ГОСТ Р 34.10-2012/512 to support different signature algorithms.
- Ensured compatibility with existing XML signature standards while integrating ГОСТ cryptography.

src/__Libraries/StellaOps.Cryptography.Plugin.CryptoPro/CryptoProGostCryptoProvider.cs

@@ -2,10 +2,12 @@ using System;
 using System.Collections.Generic;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
+using System.Runtime.Versioning;
 using StellaOps.Cryptography;
 
 namespace StellaOps.Cryptography.Plugin.CryptoPro;
 
+[SupportedOSPlatform("windows")]
 public sealed class CryptoProGostCryptoProvider : ICryptoProvider, ICryptoProviderDiagnostics
 {
     private readonly ILogger<CryptoProGostCryptoProvider>? logger;
@@ -26,7 +28,9 @@ public sealed class CryptoProGostCryptoProvider : ICryptoProvider, ICryptoProvid
                 key.Algorithm,
                 certificate,
                 key.ProviderName,
-                key.ContainerName);
+                key.ContainerName,
+                key.UseMachineKeyStore,
+                key.SignatureFormat);
 
             map[key.KeyId] = entry;
         }