Exclude "remove only" installers from `upgrade --all`, by default.

Description of the new feature / enhancement

In rare cases software will provide a "remove only" "installer". E.g. see Speedfan below ...

PS ...Sda\Code> winget upgrade --include-unknown --all
Name                             Id                     Version Available Source
--------------------------------------------------------------------------------
IrfanView 4.60 (32-bit)          IrfanSkiljan.IrfanView 4.60    4.62      winget
SpeedFan (remove only)           Almico.SpeedFan        Unknown 4.52      winget
WinDirStat 1.1.2                 WinDirStat.WinDirStat  Unknown 1.1.2     winget
Microsoft .NET SDK 6.0.310 (x64) Microsoft.DotNet.SDK.6 6.0.310 6.0.407   winget
5 upgrades available.

... I suggest these, by default, should be separately listed above and not included for execution in an --all upgrade.

The new package pinning feature makes working around this problem easy ...

PS ...Sda\Code> winget pin add Speedfan
Found SpeedFan [Almico.SpeedFan]
Pin added successfully

... however, that is a workaround.

Proposed technical implementation details

No response

Start by reproducing the winget upgrade --include-unknown --all output with a remove-only installer such as Almico.SpeedFan, then trace the upgrade-all selection and display flow. Done means remove-only installers are listed separately and are excluded from execution by default, while the existing workaround and upgrade behavior remain understandable.