Beta NFSTR Police Lightbar/Concealed flashers and Liveries 3.5

Hello.
This is NFSTR lightbar update 3.0. This is a redesign of the light bar. UV, textures and emissives.

- The UVs have been corrected so that there is no stretching.
- The textures have been redone in Substance Painter so that they have a better reflection and details like rust to give aging and realism to the lightbars.
- Emissive textures have been reworked to look more realistic and brighter without hurting your eyes too much or blocking visibility when driving in third person.
- I also corrected some beams which were not added in the Jbeam file.
- The flashers have been separated so that each flasher has its spotlight with its correct location.
- And the spotlights have been corrected and are now more visible at a distance from the vehicle and the reflection on the ground is stronger, with the white color reduced to better distinguish the 3 colors (red, blue and white).

Screens and Gifs: