feat(optional): Add Gabz PDM config (#29)

* option(config): Add optional Gabz PDM coordinates

https://i.imgur.com/Ec7rLpE.jpeg

* Remove adder & t20 as there's no SUPER category at this PDM

* Move Finance menu to main desk

* Move Purchase Spawn to back garage - https://i.imgur.com/JygMaeV.jpeg

* Move Test Drive spawn to behind building - https://i.imgur.com/YSll185.jpeg

* Move Test Drive exit location to front of building - https://i.imgur.com/YHYkgi0.jpeg

* chore(config): clean up indentation & add instructions

* chore(config) more indentation fixes

* chore(coords): Adjust gabz spawn coords so cars don't float