Migrate to poetry

[tushar5526]

Is your feature request related to a problem? Please describe.
Managing requirements.txt is difficult and poetry is the new standard for python projects now.

Describe the solution you'd like
Deprecate requirements.txt

[hvitis]

Is requirements going to be supported simultaneously during deprecation process?

[tushar5526]

Requirements should ideally be entirely removed after we migrate. Poetry can also be used to generate requirements.txt files if needed for CI-specific tasks.

[AdityyaX]

Hey @tushar5526
I'm eager to work on this issue. Could you please assign it to me?

[martynvdijke]

Saw this was stale, created #470