Add new tests and implement frame budget management

- Introduced `civilization_benchmark.gd` and `legacy_quantity_math.gd` for benchmarking and legacy quantity calculations.
- Created `test_dynamic_math.gd`, `test_frame_evolution.gd`, and `test_sparse_batches.gd` to validate mathematical operations and frame evolution logic.
- Implemented `frame_budget.gd` to manage cooperative work on the main thread, ensuring no partially calculated state is published.
- Added UID files for all new scripts to maintain unique identifiers.

tests/test_world_indicators.gd

@@ -133,7 +133,7 @@ func run() -> void:
     Parameters.advance(source, world.state, rules, E.of("1.0e12"))
     check((E.ge(world.state.trends.Integration, 0) and E.lt(world.state.trends.Integration, 1)), "Very large intervals finish with a valid trend fraction")
     check(E.ge(world.state.world_parameters.Agg, 1), "Repeated integration events cannot reduce aggression below the scale")
-    var payload: Dictionary = {"format_version": 4, "app_version": "test", "ui": {"current_page": 1}, "state": world.state}
+    var payload: Dictionary = {"format_version": 5, "app_version": "test", "ui": {"current_page": 1}, "state": world.state}
     var manager: Node = root.get_node("SaveManager")
     check(E.eq(manager.validate_data(payload), ""), "New parameters and trends pass save validation")
     var old: Dictionary = payload.duplicate(true)