fix: CLI Help missing package description

[ajpinedam]

closes #44877

This PR updates the CLI dotnet help command to include the missing information about the package command.

As part of this change, we also fixed the dotnet package --help so that the package description is displayed correctly.

[KalleOlaviNiemitalo]

Please add it here, too:

sdk/src/Cli/dotnet/commands/dotnet-package/PackageCommandParser.cs

Line 14 in 262b9c3

CliCommand command = new DocumentedCommand("package", DocsLink);

so that dotnet package --help will output it below the "Description:" heading:

Description:

Usage:
  dotnet package [command] [options]

Options:
  -?, -h, --help  Show command line help.

Commands:
  search <SearchTerm>  Searches one or more package sources for packages that match a search term. If no sources are specified, all sources defined in the NuGet.Config are used.

Compare to:

sdk/src/Cli/dotnet/commands/dotnet-list/ListCommandParser.cs

Line 32 in 262b9c3

var command = new DocumentedCommand("list", DocsLink, LocalizableStrings.NetListCommand);

[ajpinedam]

Run output

Dotnet SDK Quick Run

Dotnet SDK Help Fixed adding Package to the output

Dotnet SDK Package Help fixed adding Description

[baronfel]

Thanks for sending this!