Add a solar panel output multiplier (#7013)

* do

* world processor compatibility

* useless

core/src/mindustry/game/Rules.java

@@ -58,6 +58,8 @@ public class Rules{
     public boolean unitCapVariable = true;
     /** If true, unit spawn points are shown. */
     public boolean showSpawns = false;
+    /** Multiplies power output of solar panels. */
+    public float solarMultiplier = 1f;
     /** How fast unit factories build units. */
     public float unitBuildSpeedMultiplier = 1f;
     /** How much damage any other units deal. */

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,

core/src/mindustry/ui/dialogs/CustomRulesDialog.java

@@ -208,6 +208,8 @@ public class CustomRulesDialog extends BaseDialog{
             numberi("h", h -> state.rules.limitHeight = h, () -> state.rules.limitHeight, () -> state.rules.limitMapArea, 0, 10000);
         }
 
+        number("@rules.solarmultiplier", f -> rules.solarMultiplier = f, () -> rules.solarMultiplier);
+
         main.button(b -> {
             b.left();
             b.table(Tex.pane, in -> {

core/src/mindustry/world/blocks/power/SolarGenerator.java

@@ -26,7 +26,7 @@ public class SolarGenerator extends PowerGenerator{
         @Override
         public void updateTile(){
             productionEfficiency = enabled ?
-                Mathf.maxZero(Attribute.light.env() +
+                state.rules.solarMultiplier * Mathf.maxZero(Attribute.light.env() +
                     (state.rules.lighting ?
                         1f - state.rules.ambientLight.a :
                         1f