Sprint Button and Stamina Bar v2

Features: - Run button as in thumbnail - can be exhausted - Stamina Bar - can customize the script Updated: - if the player respawns the script still works - fixed an issue where holding the sprint button until the stamina bar runs out can still sprint if the player is still holding the button Updated v2: - Add Acceleration - Add Sound Effect (" You can delete the sound effect if you don't like it ") Fixed Default Footstep Deleted.