feat: Implement DefaultCryptoHmac for compliance-aware HMAC operations

- Added DefaultCryptoHmac class implementing ICryptoHmac interface.
- Introduced purpose-based HMAC computation methods.
- Implemented verification methods for HMACs with constant-time comparison.
- Created HmacAlgorithms and HmacPurpose classes for well-known identifiers.
- Added compliance profile support for HMAC algorithms.
- Included asynchronous methods for HMAC computation from streams.

.gitea/workflows/policy-simulate.yml

@@ -36,7 +36,7 @@ jobs:
       - name: Setup .NET 10 RC
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 10.0.100-rc.2.25502.107
+          dotnet-version: 10.0.100
           include-prerelease: true
 
       - name: Install Cosign