Added English translation!

Initially used Google Translate and DeepL to batch translate the RenPY file, but it turned out that none of them understood properly the source code file format.

Then we turned to ChatGPT and it did a near-perfect job at locating the French sentences inside the source code, keeping the Python source code in place, and producing high quality translations! We still had to manually fix the output to make some sentences sound more natural, but besides that it automated most of the boring tasks and left us only the creative part to do. Sweet!

- Nino