Add a solar panel output multiplier (#7013)

* do

* world processor compatibility

* useless

core/src/mindustry/logic/LExecutor.java

@@ -1401,6 +1401,7 @@ public class LExecutor{
                     }
                 }
                 case ambientLight -> state.rules.ambientLight.fromDouble(exec.num(value));
+                case solarMultiplier -> state.rules.solarMultiplier = exec.numf(value);
                 case unitBuildSpeed, unitDamage, blockHealth, blockDamage, buildSpeed, rtsMinSquad, rtsMinWeight -> {
                     Team team = exec.team(p1);
                     if(team != null){

core/src/mindustry/logic/LogicRule.java

@@ -13,6 +13,7 @@ public enum LogicRule{
     mapArea,
     lighting,
     ambientLight,
+    solarMultiplier,
 
     //team specific
     buildSpeed,