DTM Integrations

[1.12.2-1.2.0]

• Fixed the vehicles/cars item texture, now that fancy whwla mod you use will show a mini size of the vehicle you're looking at and not a null black and purple texture. (Thank you knoxhack)
• Actually fixed `bounds can not be negative` crash.
• Attempted to make generating a bit better. (On EOL pack this only really improved by 5 seconds sadly)

NOTES: I'm no expert when it comes to world and structure generation, so if anyone is willing to pr a good chip, I'm willing to work with it. That being said, I am still looking and digging into ways on making the generation much cleaner and less heavy on the computer.
I'm also no artist, so please judge lightly on the vehicle item texture/sprite.