Automate publication of Python SDK for BoaviztAPI

[demeringo]

Problem

The historical workflow that allowed to publish a Python SDK for Boavizta API was deleted because under the asumption that the SDK was not used anymore (and because the github action did not work well)..... but it turns out it was a false asumption.

See #356

Solution

Re-enable and fix the github action (worklfow) and document how to publish the sdk.

Alternatives

Additional context or elements

Latest version of the workflow (before deletion : https://github.com/Boavizta/boaviztapi/blob/v1.3.7/.github/workflows/build_client_sdk_with_poetry.yml)