Minor Update - Frame Rate optimization

**** IMPROVEMENTS **** - (Graphics) Added options setting to enable VSync - (Graphics) If VSync is disabled, the target frame rate for the game is set to 60. Previously, the game would run at maximum allowed FPS, which would be unnecessary on powerful configurations.

NB: activating Vsync reduces visual artifacts (screen tearing) but may slightly reduce game reactivity. This could be problematic on older machines or those with little RAM.