Ability to update sdk (ie version 6.0.306 -> 6.0.403) and install new versions (7) from cli

[bcb44]

Is your feature request related to a problem? Please describe.

Not a problem

Describe the solution you'd like

I'd like to have more control over the dotnet versions I have installed on my desktop from the cli. Specifically, I'd like to be able to update my dotnet version to a newer version with a security patch (like the one released for yesterday's SqlClient issue) without having to go to a download page. Ideally, I'd also like to be able to install a new major version of the sdk through the cli but that's optional.

This is a problem w a bunch of other languages (pyenv for python) but it'd be really awesome to have this baked into an sdk cli. It's just sort of a pain to go to the dotnet page every time there's a patch

Additional context

Pretty popular issue on StackOverflow (excuse the sarcastic response) but it shows that this issue would be well received at least.

[baronfel]

We're definitely thinking in this direction. The team did some planning for SDK acquisition from the CLI during the .NET 7 timeframe, but we weren't able to get around to it. We're taking another look for 8, so watch this space for roadmap/planning issues to start popping up as we solidify those plans.

[marcpopMSFT]

Closing this to track with #23376. We don't have a lot of details to share yet as we don't have a design or schedule for it, but this is a known request.