Add core simulation modules for owniverse mechanics

- Introduced `life_evolution.gd` to manage life evolution processes.
- Implemented `manual_production.gd` for handling production mechanics, including resource management and production steps.
- Created `object_batches.gd` to manage batches of objects, including scaling and appending batches.
- Developed `object_ledger.gd` for tracking physical amounts, available resources, and binding ownerships.
- Added `simulation_module.gd` as a base class for simulation modules, providing a weak reference to the world.
- Established `stellar_rules.gd` for managing stellar evolution and destruction mechanics.
- Introduced `universe_environment.gd` to calculate environmental parameters based on the current state of the universe.

tests/test_life_icons.gd

@@ -28,10 +28,10 @@ func run() -> void:
     world.state.stats.total_amount["C0.0"] = 3.0
     var before: Dictionary = world.state.duplicate(true)
     stage._refresh_universe_ui()
-    var counts: Dictionary = world.get_item_amounts()
+    var counts: Dictionary = world.presentation.amounts(world.state, world.catalog)
     check(counts.EON1 == 12.0 and counts.EON2 == 4.0 and counts.LP == 16.0, "Individual eons and their total include bound planets")
     check(counts["C0.0"] == 3.0 and counts.C0 == 3.0 and counts.Planet == 19.0, "Civilization detail does not double the planetary total")
-    check(world.get_item_amounts(true).EON1 == 12.0 and world.get_item_amounts(true).LP == 16.0, "Historical counts retain individual and aggregate values")
+    check(world.presentation.amounts(world.state, world.catalog, true).EON1 == 12.0 and world.presentation.amounts(world.state, world.catalog, true).LP == 16.0, "Historical counts retain individual and aggregate values")
     check(world.state == before, "Presentation does not modify simulation state")
     var pending: Array = ["EON1", "EON2", "EON3", "C0.0"]
     var pending_before: Array = pending.duplicate()
@@ -40,16 +40,16 @@ func run() -> void:
     for id in ["EON1", "EON2", "LP", "C0.0", "C0"]:
         check(decision.visible.has(id), "Unlock projection includes detail and alias: " + id)
     check(pending == pending_before and world.state == before, "Unlock evaluation leaves inputs untouched")
-    var snapshot: Dictionary = world.items_to_update.duplicate()
-    world.defer_item_updates = true
+    var snapshot: Dictionary = world.presentation.pending_amounts.duplicate()
+    world.presentation.deferred_updates = true
     world.state.amount.EON1 += 1.0
-    world.refresh_item_amounts()
-    check(world.item_amounts_dirty and world.items_to_update == snapshot, "Deferred refresh retains pending snapshot")
-    world.refresh_item_amounts(true)
-    check(not world.item_amounts_dirty and world.items_to_update.EON1 == 13.0, "Forced refresh publishes latest amounts")
+    world.presentation.refresh(world.state, world.catalog)
+    check(world.presentation.dirty and world.presentation.pending_amounts == snapshot, "Deferred refresh retains pending snapshot")
+    world.presentation.refresh(world.state, world.catalog, true)
+    check(not world.presentation.dirty and world.presentation.pending_amounts.EON1 == 13.0, "Forced refresh publishes latest amounts")
     world.state.amount.EON1 -= 1.0
-    world.defer_item_updates = false
-    world.refresh_item_amounts()
+    world.presentation.deferred_updates = false
+    world.presentation.refresh(world.state, world.catalog)
     for id in ["EON1", "EON2", "LP", "C0.0", "C0"]:
         check(stage.owniverse_items[id].visible, "Unlock both levels: " + id)
         check(stage.owniverse_items[id].description.text != "", "Populate the icon counter: " + id)
@@ -61,7 +61,7 @@ func run() -> void:
     world.state.binds.RD.EON2 = 0.0
     stage._refresh_universe_ui()
     check(stage.owniverse_items.EON2.visible and stage.owniverse_items.EON2.description.text == "", "Previously reached stage stays unlocked after extinction with no stale count")
-    for entity in world.entities.values(): entity.free()
+    for entity in world.catalog.entities.values(): entity.free()
     world.free()
     scene.free()
     print("Life icons: %d checks, %d failures" % [checks, failures])