Add DotNetNuGetAddSource aliases (synonym to DotNetCoreNuGetAddSource)

[augustoproiete]

Step 15 of N to complete the Epic: Introduce DotNet aliases (synonyms to DotNetCore aliases).

Depends on #3554 ⏳

[cake-build-bot]

🎉 This issue has been resolved in version v2.0.0 🎉

The release is available on:

• GitHub Release
• NuGet Package
• Chocolatey Package
• .Net Global Tool

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