Implement terminal based GUI

[MrPiada]

Implement a fully interactive terminal GUI (similarly to what has been done in https://github.com/aristocratos/bpytop).

Desiderata

• [ ] menu to configure the yaml input file
• [ ] board display not only with letters but with more advance characters (eg: ♔♛♙)
• [ ] repertoire variants tree represented as an ascii tree (eg: https://ascii-tree-generator.com/)

[MrPiada]

From https://github.com/JaDogg/pydoro/tree/develop another interesting library for terminal-based UI: https://python-prompt-toolkit.readthedocs.io/en/master/