[WIP] dotnet run: --from-source

[edvilme]

Closes #31103

WIP: Name, and implementation may change

[marcpopMSFT]

Commented offline that we wanted to start with "dotnet tool run --from-source". We're currently discussing alias options or auto-detection options but the full command is safest to start with.

[dsplaisted]

@edvilme I would recommend patterning this more off of local tools than global tools. Global tools download the packages to a folder structure under .dotnet\tools\.store\, and also download it to a staging folder before copying it to the final location. An executable shim is also created or copied to the global tools folder.

Local tools on the other hand run directly from the packages in the NuGet global packages folder. I think it would be easier to run a tool from there without any side effects besides the fact that the package is now in the global packages folder.

[nagilson]

Things to consider for review when it is finished / good test cases:

• Does it delete the tool, as it says without permanently installing it
• It passes the args to tools
• Version resolution works
• Uses latest if no version specified
• It uses the feed
• Make sure we prompt before downloading something new
• Does it have -y -n
• Supports nuget feed options

I like dotnet toolx personally but ok to see why we are using --from-source for now since it matches the other patterns.