fix: check-project command

[DavidVujic]

Fixes a non-functioning check-project command.

Description

The command will install dependencies by using poetry install in a temp folder, then run poetry run mypy with a path to the project-specific top namespace.

Motivation and Context

How Has This Been Tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I have read the code of conduct.
• I have read the contributing guide.
• I have updated the documentation accordingly (if applicable).