Spaceguard Turret Network

Adds the Spaceguard Turret Network, better known as Stonehenge from Ace Combat, to ICBM. Used almost explicitily for anti asteroid operations. How good are they? It's a rail gun system. You're going to need a lot more than just one to get the job done. With a railgun shot traveling at a speed of 6km/s the Spaceguard Turret Network will allow you to effectively dispatch numerous incoming ICBMs at a range of 4000km out. It also includes the ability to engage in ASAT Operations but it's a bit slower at targetting them than if it was a dedicated ASAT Silo. Later research leads to allowing it to engage aircraft, however it's not very good at this, but is always a valid option against older aircraft types. Great at taking out MIRV ICBMs before they get to split. However, this device is not infallible, it can be easily overwhelmed by a large amount of incoming ICBMs, thus the need for a network, and it lacks in defense against the already hard to hit stealth aircraft. Note: While the Stonehenge complex was planned, I couldn't figure out how to make it engage 8 different targets at once. Also, while the real weapon's range was only 1200km in lore that wouldn't scale correctly with Strangereal workshop map so I settled on 4000km because it felt close enough without pushing it.