feat: add basic support for quest events and dialog

[skleinjung]

• wip
• Move viewport management into map panel, and expedition initialization into game root.
• Add UI elements necessary for tracking objectives.
• Introduce Objective class and progress event.
• Add creatureDeath event and objectie tracker.
• Add campaign model and connect objective tracker.
• Enhance objective data model.
• wip - vignette class
• Move menu handling into a separate component from the expedition screen.
• Update speech panel, and create first version of vignette controller.
• Add engine and supporting classes.
• Extract timer out of world class.
• Update game root to use Engine class.
• Add vignette controller to expedition screen.
• Add script system, and connect objective progress events to it.
• Allow engine to render speech when scripts request it.
• wip - vignettes
• Remove vignette concept.