Add ability to specify if a world should mirror gamerules from the ov…

…erworld. This is how a vanilla custom dimension behaves. (#42)

src/main/java/xyz/nucleoid/fantasy/RuntimeWorldConfig.java

@@ -29,6 +29,7 @@ public final class RuntimeWorldConfig {
     private long timeOfDay = 6000;
     private Difficulty difficulty = Difficulty.NORMAL;
     private final GameRuleStore gameRules = new GameRuleStore();
+    private boolean mirrorOverworldGameRules = false;
     private RuntimeWorld.Constructor worldConstructor = RuntimeWorld::new;
 
     private int sunnyTime = Integer.MAX_VALUE;
@@ -97,6 +98,11 @@ public RuntimeWorldConfig setGameRule(GameRules.Key<GameRules.IntRule> key, int
         return this;
     }
 
+    public RuntimeWorldConfig setMirrorOverworldGameRules(boolean mirror) {
+        this.mirrorOverworldGameRules = mirror;
+        return this;
+    }
+
     public RuntimeWorldConfig setSunny(int sunnyTime) {
         this.sunnyTime = sunnyTime;
         this.raining = false;
@@ -178,6 +184,10 @@ public GameRuleStore getGameRules() {
         return this.gameRules;
     }
 
+    public boolean shouldMirrorOverworldGameRules(){
+        return this.mirrorOverworldGameRules;
+    }
+
     public int getSunnyTime() {
         return this.sunnyTime;
     }

src/main/java/xyz/nucleoid/fantasy/RuntimeWorldProperties.java

@@ -19,6 +19,8 @@ public RuntimeWorldProperties(SaveProperties saveProperties, RuntimeWorldConfig
 
     @Override
     public GameRules getGameRules() {
+        if (this.config.shouldMirrorOverworldGameRules())
+            return super.getGameRules();
         return this.rules;
     }