Switch to use poetry for packaging and dependency management

[newgene]

Poetry seems to be gaining popularity in Python world. We can consider switching to it. It can replace the current setup.py and/or requirements*.txt files.

Poetry works similarly to npm for Nodejs.

[newgene]

nice summary comments about poetry v.s. hatch at NCATSTranslator/reasoner-validator#54 (thanks @andrewsu pointed us to it). We should do some evaluation for our particular use case.