[modding] Implement Vehicles & Fix Animations (#109)

* Train works

* Fix minimap

* Fix highway

* Fix

* Refactor train and boat

* Update

* Implement Trucks

* Fix tanker

* Finish implementing vehicles

* Fix animations

* Fix spawn players

* Fix spawn players

* Fix loading custom data

---------

Co-authored-by: MegaMech <7255464+MegaMech@users.noreply.github.com>

src/engine/courses/Course.cpp

@@ -147,6 +147,7 @@ void Course::UpdateClouds(s32 arg0, Camera* camera) {
     }
 }
 
+// Adjusts player speed on steep hills
 void Course::SomeCollisionThing(Player *player, Vec3f arg1, Vec3f arg2, Vec3f arg3, f32* arg4, f32* arg5, f32* arg6, f32* arg7) {
     func_8003E048(player, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
 }
@@ -197,12 +198,6 @@ void Course::SetStaffGhost() {
 }
 
 void Course::SpawnBombKarts() {
-//    GetWorld()->SpawnBombKarts();
-}
-
-World* Course::GetWorld() {
-    return nullptr;
-     //&gWorldInstance;
 }
 
 void Course::Waypoints(Player* player, int8_t playerId) {