Saddle me Naturalist

Added: Boar (pig-style: saddle directly, steer with carrot on a stick, boostable), lion (raw-meat taming ⅓ chance, horse-style with strong leap), hippo (melon-slice taming, camel-style, swims), rhino (wheat taming, strong charge dash), elephant (hay-block taming, slow, 1.5 step-up), giraffe (saddle upgrade over built-in riding — later removed). Visible saddles on all mounts (painted onto the animated models). Horse-style inventory screen (inventory key while riding or sneak + empty hand; saddle slot). Jump-bar leap (deer/lion) and camel dash (big mounts). Taming feedback: smoke per attempt, hearts on success. Fixed: Deer flee-AI regression — wild animals keep 100% stock behavior; only saddled/ridden mounts stay calm.