WIP: feat(scene) initial beauty baseline — terrain textures, sky, foam, mist, foliage, shadows

- Add 3 Terrain3D texture assets (limestone, valley grass, warm soil)
- Sculpt initial Terrain3D heightmap with ridge, valley, waterfall drop
- Replace plain water with emissive-tinged material
- Add foam mesh, mist spheres, and procedural sky with valley fog
- Add 10 StylizedTree instances around village perimeter
- Enable directional light shadows with extended cascade range
- Add tree height snapping to terrain surface
- Add refined scaffold tests for material count, terrain height, foliage, sky, fog
- Add terrain texture PNGs and StylizedTree.tscn scene
- Add generate_jajce_terrain.gd tool

world/jajce/jajce_world.gd

@@ -3,9 +3,13 @@ extends Node3D
 @onready var terrain: Terrain3D = $TerrainRoot/Terrain3D
 
 func _ready() -> void:
-	call_deferred("_bind_active_camera")
+	call_deferred("_initialize_world_presentation")
 
-func _bind_active_camera() -> void:
+func _initialize_world_presentation() -> void:
 	var active_camera := get_viewport().get_camera_3d()
 	if active_camera != null:
 		terrain.set_camera(active_camera)
+	for tree in $FoliageRoot.get_children():
+		var terrain_height: float = terrain.data.get_height(tree.global_position)
+		if not is_nan(terrain_height):
+			tree.global_position.y = terrain_height