Scoop: Flag packages to ignore updates

[brunovieira97]

Allow apps to be marked to ignore new versions, unless explicited via scoop update <app>.
Command scoop update * would skip apps flagged to ignore updates.

Useful for apps such as gcc which might contain custom libraries inside its directories, leading to broken experience under some circumstances.

[rasa]

Perhaps to pin/unpin a specific app: scoop pin app and scoop unpin app.
To pin/unpin all apps: scoop pin * and scoop unpin *?

Once an app is pinned, updates to it would be ignored until the app is unpinned, or uninstalled.

[gdw2]

This would likely be useful for packages that auto-update themselves, like vscode and chrome.

[brunovieira97]

Duplicate of #1941