Add basic pea shooter weapon to the player's ship

[Rybadour]

The weapon should spawn a bullet at a minimum interval, say every 0.5 secs, while the fire key is pressed. The bullets should collide with enemy ships and be cleaned up if they leave the screen.

[cdrllrd]

Weapon system has been implemented, with a SingleShooter, and is added to the PlayerShip at the start of the game.

Only enemy bullets should be cleaned up when they leave the screen, Players bullets will be removed when they leave the bastard circle, which can be partially offscreen

[Rybadour]

Waiting on Collision for this to completed.