Add colour to logging

Description

I was sitting in an online meeting where I wasn't directly involved so I had a play. Could look much worse. Example run and output below.

Further docs:

• https://github.com/Delgan/loguru
• switching from the core logging library https://loguru.readthedocs.io/en/stable/resources/migration.html#
• demo gif on homepage also really well done https://loguru.readthedocs.io/en/stable/

poetry run fgen generate -f --manager-directory tests/test-data/arrays/generated --wrapper-directory tests/test-data/arrays/generated --python-directory tests/test-data/arrays/generated --extension generated._lib tests/test-data/arrays/arrays.yaml

Merge Request Steps

Please confirm that this pull request has done the following:

• Tests added
• Documentation added (where applicable)
• Changelog item added to changelog/.