refactor(world): optimize visuals and item definitions

Add new high-res textures for planetary systems, remove placeholder graphics and update scene tree structure in 'world.tscn

world/owniverse.gd

@@ -27,7 +27,7 @@ var entity_batches = {}
 func cycle(year_delta: float) -> void:
     # all owniverse activity should be called here
     _auto_production(year_delta)
-    _entity_evolution(year_delta)
+    #_entity_evolution(year_delta)
     
     _check_locked_items()
     
@@ -49,6 +49,7 @@ func _auto_production(year_delta: float) -> void:
                 
 
 func _entity_evolution(year_delta: float) -> void:
+    print("evolution: ", year_delta)
     pass
     
 func _get_distribution(source: Dictionary) -> Dictionary:
@@ -151,7 +152,7 @@ func change_speed(delta: int) -> int:
 
 
 func load_data() -> bool:
-    var is_succesfull = false
+    #var _is_succesfull = false
     
     var game_data: Dictionary = SaveManager.load_data("owniverse", "qwerty")
     if game_data == {}: