Bring in Packager and make console commands extendable

[LukeTowers]

Related: wintercms/winter#1259

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[github-actions]

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[github-actions]

This pull request will be closed and archived in 3 days, as there has been no activity in the last 60 days.
If this is still being worked on, please respond and we will re-open this pull request.
If this pull request is critical to your business, consider joining the Premium Support Program where a Service Level Agreement is offered.

[github-actions]

This pull request will be closed and archived in 3 days, as there has been no activity in the last 60 days.
If this is still being worked on, please respond and we will re-open this pull request.
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