Further syntax validation

[haroldo-ok]

• [ ] Syntax check Monogatari commands:
  • [ ] Validate music commands:
    • [ ] play music;
    • [ ] stop music;
    • [ ] pause music;
    • [ ] play voice;
    • [ ] play sound;
    • [ ] play video;
  • [ ] Validate character commands:
    • [ ] show character;
    • [ ] hide character;
  • [ ] Validate image commands:
    • [ ] show image;
    • [ ] hide image;
  • [ ] Validate other commands:
    • [ ] scene
    • [ ] jump
    • [ ] wait