Fix mount sounds, grey WMO meshes, taxi landing, tree animations, and classic dismount

- Per-family mount sounds (kodo, tallstrider, mechanostrider, etc.) detected from M2 model path
- Skip WMO groups with SHOW_SKYBOX flag or all-untextured batches (grey mesh in Orgrimmar)
- Freeze physics during taxi landing until terrain loads to prevent falling through void
- Disable bone animations on tropical vegetation (palm, bamboo, banana, etc.) to fix wiggling
- Snap player to final taxi waypoint on flight completion
- Extract mount aura spell ID from classic UNIT_FIELD_AURAS for CMSG_CANCEL_AURA dismount
- Increase /unstuck forward nudge to 5 units

src/game/update_field_table.cpp

@@ -32,6 +32,7 @@ static const UFNameEntry kUFNames[] = {
     {"UNIT_FIELD_FLAGS_2", UF::UNIT_FIELD_FLAGS_2},
     {"UNIT_FIELD_DISPLAYID", UF::UNIT_FIELD_DISPLAYID},
     {"UNIT_FIELD_MOUNTDISPLAYID", UF::UNIT_FIELD_MOUNTDISPLAYID},
+    {"UNIT_FIELD_AURAS", UF::UNIT_FIELD_AURAS},
     {"UNIT_NPC_FLAGS", UF::UNIT_NPC_FLAGS},
     {"UNIT_DYNAMIC_FLAGS", UF::UNIT_DYNAMIC_FLAGS},
     {"UNIT_END", UF::UNIT_END},