Game update to the new Unreal version 5.8

The update has upgraded the Unreal Engine version from 5.1 to 5.8 and includes adjustments to the game's difficulty, making it easier to play.
Changes made to game mechanics:
- 10% increase in stamina
- Increased character movement speed
- 50% increase in sanity recovery upon completing a task
- Increased resources provided by abilities
- Reduced sanity cost when using an ability
- Reduced requirements for completing a task
- Lowered battery consumption
- Lowered stamina (vigor) cost