Add comprehensive tests and optimizations for simulation and UI performance

- Introduced a new benchmark save script to create a stress test scenario with extreme values for simulation performance.
- Added a full UI benchmark script to measure frame rates and performance metrics during UI interactions.
- Implemented tests for coarse generations to ensure population transitions are handled correctly.
- Created tests for extra parameters to validate the loading and application of configuration settings.
- Developed simulation optimization tests to verify the efficiency of population drift and rounding mechanisms.
- Added split optimization tests to ensure accurate allocation and rounding behavior in population management.
- Included startup parameter tests to confirm the correct initialization of global parameters before scene readiness.
- Enhanced the audit rounding ledger to compare selective and full rounding results for consistency.

tests/test_life.gd

@@ -66,6 +66,8 @@ func run() -> void:
     world = fixture()
     world.state.amount.RD = 1
     world.state.binds.RD = {"EON5": 40000}
+    # Test host preservation with a fixed rate, independent of game balance.
+    world.catalog.entities.EON5.life_rule.progress = "0.00025"
     world.evolution.initialize_life_batches()
     world.evolution.evolve_batches(world.state, E.add(500000, E.divide(500000, 40)))
     check(E.eq(world.state.binds.RD["C0.0"], 10), "Intelligence emerges at the same host star")