feat(packages): ludic.wildlife - a valley's animals: species handed in as data, ranges placed against the ground and moved with the season, the day's steering, the senses and a net alert that settles, feeding, lures and snares, birds, spawning and repopulation, its own dice, facts and a save section

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/ludic.wildlife/needs.ludic

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+# needs.ludic - thirst and hunger climb with the game hours (midday is thirsty work, a run costs more
+# than a graze, dawn and dusk are when they go down to drink), and a walker leaves droppings
+function wl_needs(a: WildAnimal, gh: float) -> void {
+  let h = WildlifeWorld.hour()
+  var thirst = 8.0
+  var hunger = 5.0
+  if h > 11.0 and h < 16.0 { thirst = 12.0 }
+  if a.state == WILD_FLEE or a.state == WILD_CHARGE {
+    thirst = thirst * 3.0
+    hunger = hunger * 2.0
+  }
+  if (h > 5.0 and h < 8.0) or (h > 18.0 and h < 21.0) { thirst = thirst * 1.8 }
+  a.thirst = Math.min(a.thirst + thirst * gh, 100.0)
+  a.hunger = Math.min(a.hunger + hunger * gh, 100.0)
+  if not wl_sp(a.sp).tracks { return }
+  a.scat_t = a.scat_t - gh * 60.0
+  if a.scat_t > 0.0 { return }
+  a.scat_t = 120.0 + wl_rnd() * 300.0
+  wl_near(a.x, a.z)
+  if wl_pdist(wl_near_i, a) > 500.0 { return }      # further than 500 m from everyone: nobody would find it
+  wl_fact(WILD_SCAT, a)
+}