Add feature for `dotnet-tool`

Right now, I have a couple `dotnet tool install -g ${TOOL_NAME}@${TOOL_VERSION}` calls that need to be run before a `dotnet restore` could be executed. Currently, I use the different lifecycle phases to ensure it's not done in parallel to the `dotnet restore`. But technically, it would be cleaner as feature which receives the name and optionally a version or additional flags like `allow-roll-forward` to ensure build order.

As local tools would need a manifest and usually would just need a `dotnet tool restore`, I only really see global tools as use-case here.

Could this be something interesting to the general or is it more like something only I'm interested in? Because if it's not, I will just go and do the feature on a user-based repository instead for personal usage. I could also offer an PR if there's interest in this at-all. Just making sure this would make sense to go into here 😀