wip(ecs): ludic.wildlife on a Table<WildAnimal> - UNBUILT

Written while builds are held (agents share 16 GB; no build or run until the user lifts it), so
it has not been compiled or tested. The animals are rows of a ludic.base Table: x, z, species and
alive as columns, a 32 m grid over the living, the living by species, and a nid map.
wildlife_by_nid is a map lookup instead of a scan of every animal ever made, wildlife_count walks
only its species, wildlife_nearest asks the grid, wildlife_set_alive writes the flag and the row
together, and wildlife_refile files the tick's moves once after it (wildlife_verify holds the
columns to the records). A guest puts its whole table away and brings it back. A test case covers
them; to run once builds are allowed: ludic test packages/ludic.wildlife.

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

packages/ludic.wildlife/run.ludic

@@ -4,6 +4,7 @@ export function wildlife_tick(wildlife_st: mut WildlifeState, dt: float, gh: flo
   wl_seed_scan(wildlife_st, dt)
   let all = wildlife_all(wildlife_st)
   for i in 0 .. len(all) { wl_tick_one(wildlife_st, all[i], dt, gh) }
+  wildlife_refile(wildlife_st)
 }
 
 function wl_tick_one(wildlife_st: mut WildlifeState, a: WildAnimal, dt: float, gh: float) -> void {