[DCR]: Rename packageNamespaces feature to packageSourceMapping

[kartheekp-ms]

NuGet Product(s) Affected

NuGet.exe, Visual Studio Package Management UI, Visual Studio Package Manager Console, MSBuild.exe, dotnet.exe

Current Behavior

Namespaces configuration currently can be configured as follows

<packageNamespaces>
    <packageSource key="nuget.org">
      <namespace id="*" />
    </packageSource>
    <packageSource key="contoso.com">
      <namespace id="Contoso.*" />
    </packageSource>
</packageNamespaces>

Desired Behavior

Namespaces configuration should be as follows.

1. Rename packageNamespaces to packageSourceMapping
2. Rename namespace to package
3. Rename id to pattern

<packageSourceMapping>
    <packageSource key="nuget.org">
      <package pattern="*" />
    </packageSource>
    <packageSource key="contoso.com">
      <package pattern="Contoso.*" />
    </packageSource>
</packageSourceMapping>

Additional Context

No response

[loic-sharma]

Just curious, why did we decide to rename these? Personally I slightly preferred the old names.