Modules calling simplified

[AlexandruAntonescuKeysight]

Summary

This PR is intended to simplify the modules calling. It has the following additions:

• updates the github checkout action to the last version
• offers a solution to that redundancy problem when calling modules. For this, the pyproject.toml file was enhanced and the structure of the project was not modified.
• now the user can call a module like this:

chakra_generator --num_npus 1

instead of

python3 -m chakra.et_generator.et_generator --num_npus 1

• also, the old syntax is still available
• updates the main.yml workflow example to match the new syntax

Test Plan

Tested locally after installing the package.
Tested to see if it behaves the same as the previous approach of calling modules.

[github-actions]

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[srinivas212]

LGTM! Thanks for your contributions.