Wildlife and nature: animals, beehives, bushes, flowers, rocks, logs

New stdlib module wildlife.rhai:
- Animals (new palette category): Deer (stag with antlers, does, fawns),
  Wild boar, Fox, Elephant (bull with tusks, cow, calf), Rabbits. Low-poly
  solids from faces (loft, tube), parts drawn back to front by depth, faces
  edged in their own shade (class beast). Herds scatter round a spot, each
  animal its own sprite facing about the object's rotation. Grazing
  animals switch between two head poses (iso-pose2 groups), elephants curl
  their trunks, rabbits hop.
- Birds and Butterflies as flocks: swim() takes a shape (bird, fly, bee);
  wings flap out of step. Fish output unchanged.
- Beehives on stands with supers, lids, entrances and bees flying round;
  Bush (round, flowering, berries); Flowers (bed in rows or meadow); Rocks;
  Log or stump. g-meadow and g-soil ground materials.
- polyline() takes 3D points as documented (antlers).

Theme colours for dark and light, viewer CSS for poses, flapping, hopping.
examples/country: elephants in a paddock with a cut corner, deer at a
forest edge, boar, fox, rabbits, an apiary by a meadow, a pond, a lane,
fence and hedgerow at angles; Country demo in the web Studio and deploy.
MCP guidance, README, SCRIPTING, ROADMAP.

Tests: Rust 78, Studio 122; existing examples draw the same (only the
embedded theme CSS grew).

tools/check_web.py

@@ -342,6 +342,22 @@ try:
         check(meets == "east-ave, park-rd" and ring.startswith("4:"), f"streets know what they meet: cross-st meets {meets}; roundabout arms {ring}")
         shot(pg, "web-streets.jpg")
 
+        # ---------------------------------------------------------------- the country demo: animals, an apiary, diagonals
+        pg.locator("#wb-projects").click()
+        pg.locator("#wb-ncountry").click()
+        pg.wait_for_load_state()
+        ready(pg)
+        pg.wait_for_timeout(500)
+        nc = len(doc(pg)["objects"])
+        beasts = pg.evaluate("() => new Set([...document.querySelectorAll('.iso-svg .iso-beast')].map(e => e.closest('[data-obj]')?.dataset.obj)).size")
+        poses = pg.evaluate("() => document.querySelectorAll('.iso-svg .iso-pose2.iso-pose0').length")
+        check(title(pg) == "isokit country" and nc > 30 and beasts >= 8 and poses >= 12 and pg.evaluate("() => __studio.S.warnings.length") == 0,
+              f"Country demo opens the countryside ({nc} objects, {beasts} animal and rock groups, {poses} grazing animals, no warnings)")
+        herd = pg.evaluate("() => Object.fromEntries((__studio.view.info('elephants') || {rows: []}).rows)['Herd'] || ''")
+        rot = pg.evaluate("() => __studio.S.doc.objects.find(o => o.id === 'lane-d').rot")
+        check(herd == "1 bull, 1 cow, 1 calf" and abs(rot - 45) < 1e-6, f"elephants: {herd}; the lane bends at {rot} degrees")
+        shot(pg, "web-country.jpg")
+
         # ---------------------------------------------------------------- a system asking for less motion
         # (Windows: Animation effects off): the view starts still, but the button stays and turns it on
         rctx = b.new_context(viewport={"width": 1200, "height": 800}, reduced_motion="reduce")