Update 1.2.1 — COMBOLITE Steam update #110239

Somewhat of an optimization for projectiles. When you have more than 100 projectiles spawned in, then second slot projectiles will be simulated instead of actually spawned. This should greatly reduce lag and the cost of accuracy. I tried to match it reasonably closely, but it's not perfect. Projectile base damage and multiplier buffs now use bigint for calculations and UI. Made the "total buffs" section of weapon descriptions show scientific notation to avoid the text going outside of their backgrounds. Migrated over to Godot version 4.5 dev 4. which should give a decent FPS boost on endgame savefiles. MIGHT BE UNSTABLE? BUT SO FAR IT'S FINE.