Default (user) installations as admin should warn (or block without a flag) that the package may be impossible to uninstall

Relevant area(s)

WinGet CLI

Description of the new feature / enhancement

If you install an app under admin (but with the default "user" scope) to be able to install to Program Files, you won't be able to uninstall this app using Winget since it blocks such uninstalls for security reasons
https://github.com/microsoft/winget-cli/pull/6345#issuecomment-4871808323
Winget should try to prevent such situations from appearing in the first place

Proposed technical implementation details

I think that at least there should be a warning when you try to install elevated , something like

• ~"App is being installed for the current user, not machine, but with admin rights. You'll not be able to run the uninstaller via Winget with admin rights, so if you install to an admin-protected location you won't be able to remove it (link to the docs for details)"

And maybe an even more drastic restriction could be - you should pass an extra flag to allow such an operation, so winget should prevent installation under such conditions without a flag

Maybe there could be a smarter way where the warning/block only happens if the target directory is admin-protected, but not sure Winget has the full knowledge of all the folders the installer will modify for this

Start with the WinGet CLI install and uninstall flows, focusing on elevated installs using the default user scope and targets such as Program Files. Review how admin rights and uninstall restrictions are currently handled. Done would be an agreed warning or flag-gated block for risky installations, with behavior covering the scope and target-directory cases described in the issue.