packem validate command

[prisis]

Clear and concise description of the problem

A command to validate the package

Suggested solution

packem validate

Alternative

No response

Additional context

• used publint core
• used arethetypeswrong

Validations

• Follow our Code of Conduct.
• Read the Contributing Guidelines.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[github-actions]

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