Python Actors: Add option for using Poetry setup

[vdusek]

Description

• Currently, the apify create process only provides a Pip setup by default.
• This enhancement aims to offer users the flexibility to choose between Pip and Poetry setups during the creation process.

Proposed Changes

• Update the Dockerfile.
• Remove requirements.txt and add pyproject.toml (and optionally poetry.toml) instead of it.
• Take a look at the Beautiful Soup Scraper for inspiration.

Open questions

• Figure out how to not make duplicates of the current Python code in the templates.

Motivation

• User request on Discord.

Current situation

• If users want to use Poetry for their Actor setup, they have to do the update manually. They can take a look at the Beautiful Soup Scraper for inspiration where Poetry is integrated.

[vdusek]

Closing in favor of #350.