M1d: creatures, hunting, weapons, food buffs and the hide cloak

- Rabbits, deer and boars with procedural meshes and animated legs, a
  state machine (idle/wander/flee/charge/dead) and heightmap steering that
  avoids water, cliffs, the world edge, trees and buildings
- Spawner keeps a habitat-based budget around the player (6/4/3)
- Melee needs a weapon or tool (club, spear, axe, pickaxe); box sweep hits
- Wooden spear (thrust or throw) and crude bow with draw-scaled arrows;
  projectiles stick in the world as saved pickups
- Carcasses: E to butcher for meat, hide and embedded arrows
- Boars charge and gore when hit; hurt flash and a brief healing pause
- Cooked meat gives Well fed (faster stamina and healing); buffs saved
- Hide cloak: wear for warmth, saved, goes in the grave on death
- Feathers as meadow pickups (appended, existing save ids unchanged)
- New test_creatures_combat suite; run_all.sh gets a per-suite time limit

tests/run_all.sh

@@ -4,10 +4,14 @@
 # Usage: tests/run_all.sh   (from the repo root; needs `godot` on PATH)
 cd "$(dirname "$0")/.." || exit 1
 status=0
-for t in test_survival_core test_survival_stats test_save_load test_weather_building test_terrain_edges test_boundary; do
+for t in test_survival_core test_survival_stats test_save_load test_weather_building test_creatures_combat test_terrain_edges test_boundary; do
 	extra=""
 	[ "$t" = "test_boundary" ] && extra="--fixed-fps 30"
-	out=$(godot --headless --path . $extra --script "res://tests/$t.gd" 2>&1)
+	# A suite that waits on a world that failed to load would hang forever,
+	# so give each one a time limit when `timeout` is available.
+	limit=""
+	command -v timeout >/dev/null 2>&1 && limit="timeout 300"
+	out=$($limit godot --headless --path . $extra --script "res://tests/$t.gd" 2>&1)
 	code=$?
 	result=$(printf '%s\n' "$out" | grep "RESULT:" | tail -n 1)
 	if [ $code -ne 0 ] || printf '%s\n' "$out" | grep -q "SCRIPT ERROR"; then