Add a Stamina Bar

• Jumping reduces Stamina so people can't spam it constantly.
• Recon breath holding uses Stamina so they can only hold focus for so long, gotta get that shot off quickly once they hold it.
• Add a Sprint to run for a short period that drains stamina.

Additionally the stamina bar could be adjusted for perks such as a sniper perk that allows more stamina but lower health or damage. Assault gets less stamina but more overall health as a tank style soldier wearing body armor slows them.