An experience to create "isolated" task

[wli3]

Since we have task assembly load context checked in. We should be able to produce such Task easily and consume them with just a package reference.

The implementation code will probably be in SDK. And share a big chuck with PackAsTool=true

[wli3]

We should have a template and something like dotnet build /p:packAsTask=true

and one the consumer side just add a package reference. And you can use the target maybe even without <using....>

[Nirmal4G]

Do you mean this #4834?

[wli3]

I don't think that's the same

[Nirmal4G]

Ahhh... Similar to SDKs but only with UsingTask in the imports. I see now.

Projects like MSBuild Extension Pack and many others would benefit from this.

Having a project system to author, debug and test MSBuild packages would complement this.

[rainersigwald]

I think this could be rolled into #7548.