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.

autoload/save_manager.gd

@@ -374,8 +374,10 @@ func load_settings():
     var config = ConfigFile.new()
     var err = config.load(SAVE_PATH)
     if E.ne(err, OK):
+        Global.set_locale(str(Global.Settings.language))
         return false
     for item in Global.Settings:
         Global.Settings[item] = config.get_value(SETTING_SECTION, item, Global.Settings[item])
+    Global.set_locale(str(Global.Settings.language))
     return true
 #endregion