Adding system_info('world_min_spawning_light') (#1475)

docs/scarpet/api/Auxiliary.md

@@ -753,7 +753,8 @@ system calls. In all circumstances, these are only provided as read-only.
   * `world_center` - Returns coordinates of the center of the world with respect of the world border
   * `world_size` - Returns radius of world border for current dimension.
   * `world_max_size` - Returns maximum possible radius of world border for current dimension.
-  * 
+  * `world_min_spawning_light` - Returns minimum light level at which mobs can spawn for current dimension, taking into account datapacks
+
 ##### Relevant gameplay related properties
   * `game_difficulty` - current difficulty of the game: `'peaceful'`, `'easy'`, `'normal'`, or `'hard'`
   * `game_hardcore` - boolean whether the game is in hardcore mode

src/main/java/carpet/script/utils/SystemInfo.java

@@ -200,6 +200,7 @@ public class SystemInfo {
             });
             return MapValue.wrap(rules);
         });
+        put("world_min_spawning_light", c-> NumericValue.of(c.s.getLevel().dimensionType().monsterSpawnBlockLightLimit()));
 
         put("source_entity", c -> EntityValue.of(c.source().getEntity()));
         put("source_position", c -> ValueConversions.of(c.source().getPosition()));