Implement civilization flow mechanics and profiling for resource allocation

- Added `civilization_flow.gd` to manage continuous expected flows and resource allocation within civilizations.
- Introduced `allocate_profiled` and `whole_quotas` functions in `quantity_math.gd` for precise stock allocation based on float shares.
- Enhanced `credit` logic in `object_ledger.gd` to handle production remainders more effectively.
- Updated `append_batch` in `object_batches.gd` to prevent batch creation for invalid IDs.
- Introduced `ratio_approx` function in `exact.gd` for better handling of float profiles.
- Added a benchmark script `benchmark_civilization_flows.gd` to evaluate the performance of civilization flow mechanics.
- Refactored various functions to improve clarity and efficiency in handling resource flows and allocations.

tests/test_world_indicators.gd

@@ -1,7 +1,6 @@
 extends SceneTree
 const E = preload("res://world/owniverse/math/exact.gd")
 const CivilizationState = preload("res://world/owniverse/civilization_state.gd")
-const CivilizationEvolution = preload("res://world/owniverse/civilization_evolution.gd")
 
 const Parameters = preload("res://world/owniverse/world_parameters.gd")
 const Descriptions = preload("res://world/owniverse/item_description.gd")
@@ -98,10 +97,8 @@ func run() -> void:
     var next_stage: String = global.CivilizationRules["C0.2"].next
     var outcomes: Array = []
     for target in [baseline, advanced]:
-        var expired: Dictionary = {"C0.2": [{"amount": 1000000, "from": 0, "to": 1}]}
-        var budget: Dictionary = CivilizationState.stellar_budget(world, target, global.CivilizationRules)
-        CivilizationEvolution.prepare(world, target, expired, 1, budget, global.CivilizationRules)
-        outcomes.append(expired["C0.2"][0].products.get(next_stage, 0))
+        world.civilization_flow.evolve(target, 0, 2000)
+        outcomes.append(target.amount.get(next_stage, 0))
     check(E.gt(outcomes[1], outcomes[0]), "Aggression changes actual ethical civilization transitions")
     dispose(world)