chore: restructure game initialization to allow narration to play at load time

[skleinjung]

• Refactor API code to new package. Create 'game' events.
• Refactored game structure to allow for 'post-UI' initialization in world scripts.
• Add support for directing the UI to show content from scripts.
• Update timing and spacing of narration. Make speaker optional.
• Add narration on first loading game.
• UI updates to make descriptions stand out more and remove extra elements.
• Add support for text commands.
• Add movement commands.
• Add say command that just echoes what you said.