Show links in `winget list` command

Description of the new feature / enhancement

For portable apps, it would be good to show the symlinks created by a package in the list command. Alternately, a winget links command that shows the link name and target.

Proposed technical implementation details

Example powershell function:

function Get-WinGetLinks {
    <#
        .SYNOPSIS
            List winget links
    #>
    [CmdletBinding()]
    [Alias("wglinks")]
    param ()

    $linksPath = Join-Path $Env:LOCALAPPDATA -ChildPath Microsoft\WinGet\Links
    Get-ChildItem -Path $linksPath | Where-Object -Property LinkType -eq -Value "SymbolicLink" | Format-Table -Property Name, LinkTarget
}

Start by examining the winget list command and the proposed winget links entry point, then compare their behavior with the PowerShell example using %LOCALAPPDATA%\Microsoft\WinGet\Links. Decide whether links belong in winget list or a separate command, and define completion as reliably showing each symbolic link's name and target for portable apps.