Add new module command

[thomas-bc]

Originating Project/Creator
Affected Component
Affected Architectures(s)
Related Issue(s)	nasa/fprime#2006
Has Unit Tests (y/n)
Builds Without Errors (y/n)
Unit Tests Pass (y/n)
Documentation Included (y/n)

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Change Description

Adds fprime-util new --module

Rationale

For nasa/fprime#2006

[thomas-bc]

CI failing because of Python 3.7. Opened #175 to remove Python 3.7 support / CI runs.