[refactoring] Support for Allure Reporting

[ngarbezza]

Problem

We lack of reporting support. At all. We don't have JUnit XML or TAP or any other alternative

Proposed solution

Start with https://allurereport.org/, make testy generate allure reports with a configuration (not enabled by default, default is just console output). If it's enabled, prints the result on BOTH stdout and allure reporting folder.

Add a step in github actions to generate the artifact with the Allure report.