Finish Underground 1 support for Global and Frontend files.

- Make PresetRide class derived from Shared instance.
- Make CarTypeInfo class derived from Shared instance.
- Make GCareerRace class in Gameplay section.
- Clone classes that have same structure in other supports.
- Create CarPartManager based on other supports.
- Create Loader and Saver for this support.
- Create Database derived from abstract instance.