v1.2.0: Chinese translation!

Hello, and happy belated Chinese New Year! This patch brings full Chinese translation from the folks at BIOHAZARD.CLUB! It also brings a couple new QoL features and fixes: see changelog below!

• Chinese translation now available!
• Chapter selection: quickly skip to any chapter you've already visited!
• Full controller support!
• Can now navigate menus with your keyboard!
• Many bugfixes and small improvements!