Creatures with models and animations, spawned from the atlas

Felucca is orc land, but the world has only humanoid bandits and, in the economy (#121), deer, wolves and bears drawn as capsules. The atlas already has 15 encounter zones with tables of 33 encounter types, danger per cell, orc camps and monster lairs.

• Animals with real models and animations: deer, wolf, bear first, then the pack animals; Quaternius' CC0 animated animal packs as the shortcut, the video-to-animation pipeline (plan in docs/creature-animation-plan.md, not committed yet) for what they lack.
• Orcs as the native enemy: models from the character pipeline with their own outfits, orc camps and patrols, orcish names; a few monsters for the higher danger levels.
• Spawns from the atlas: encounter zones and danger pick what lives where, with respawn timers and leashes, never in guard zones or the sanctuary; loot tables per creature.
• Behaviours per archetype (prey flees, beasts hunt in packs, orcs raid caravans on roads).

Done when every encounter zone of the baked world has creatures with models, animations and loot, and the capsules are gone.