Mathematico Game - initial

What's Changed

• Update README by @balgot in #1
• Game logic by @balgot in #3
• Add requirments by @balgot in #4
• Create pytest.yml by @balgot in #5
• Refactor by @balgot in #6
• Mcts by @balgot in #7
• Playable version by @balgot in #10
• Restructure the code, create installable package by @balgot in #17
• Documentation for the package, Game analysis by @balgot in #21

Full Changelog: https://github.com/balgot/mathematico/commits/v1.0.0