Added Manager Mode and Removed Pay to Win elements from the game

New Features:
- Manager Mode: A new mode that allows the player to focus less on driving and more on the strategic elements of the game
- Manager Mode has been added to the 1v1 duel mode and the public and private party lobby

Improvements:
- Chest Crew boxes cannot be bought from real money anymore. The only way to get them is by playing the game.
- Made some tweaks to the AI racing line

Changes:
- Series 1 of 1v1 mode starts with 4 laps instead of 8 laps
- Reverted back to the old Engine mode consume and refill speed