Add turret ammo capacity to the in-game help (#9777)

* Add turret ammo capacity to the in-game help

* Rename max shots to ammo capacity

* Rename ammo multipier to ammo per item

core/src/mindustry/world/blocks/defense/turrets/ItemTurret.java

@@ -49,6 +49,7 @@ public class ItemTurret extends Turret{
 
         stats.remove(Stat.itemCapacity);
         stats.add(Stat.ammo, StatValues.ammo(ammoTypes));
+        stats.add(Stat.ammoCapacity, maxAmmo / ammoPerShot, StatUnit.shots);
     }
 
     @Override

core/src/mindustry/world/meta/Stat.java

@@ -86,6 +86,7 @@ public class Stat implements Comparable<Stat>{
     targetsGround = new Stat("targetsGround", StatCat.function),
     damage = new Stat("damage", StatCat.function),
     ammo = new Stat("ammo", StatCat.function),
+    ammoCapacity = new Stat("ammoCapacity", StatCat.function),
     ammoUse = new Stat("ammoUse", StatCat.function),
     shieldHealth = new Stat("shieldHealth", StatCat.function),
     cooldownTime = new Stat("cooldownTime", StatCat.function),

core/src/mindustry/world/meta/StatUnit.java

@@ -24,6 +24,7 @@ public class StatUnit{
     degrees = new StatUnit("degrees"),
     seconds = new StatUnit("seconds"),
     minutes = new StatUnit("minutes"),
+    shots = new StatUnit("shots"),
     perSecond = new StatUnit("perSecond", false),
     perMinute = new StatUnit("perMinute", false),
     perShot = new StatUnit("perShot", false),