👷 Add a workflow publishing the package to PyPI

[paduszyk]

Description

The workflow added:

1. uses a Python script to read the current version from pyproject.toml;
2. publishes the package to PyPI with gh-action-pypi-publish action;
3. creates a release tag;
4. publishes the package release in GitHub with action-gh-release.

[codecov]

Codecov Report

Merging #20 (90015dc) into main (80a14f5) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main       #20   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            8         8           
  Lines           76        76           
  Branches        14        14           
=========================================
  Hits            76        76           

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