fix: Remove global state (#1216)

* Remove all global settings state

* chore: remove autogenerated class

* chore: cleanup

* chore: merge conflicts

tests/fixtures/mock_injector.py

@@ -1,10 +1,13 @@
 from collections.abc import Callable
+from typing import Any
 from unittest.mock import MagicMock
 
 import pytest
 from injector import Provider, ScopeDecorator, singleton
 
 from private_gpt.di import create_application_injector
+from private_gpt.settings.settings import Settings, unsafe_settings
+from private_gpt.settings.settings_loader import merge_settings
 from private_gpt.utils.typing import T
 
 
@@ -24,6 +27,12 @@ class MockInjector:
         self.test_injector.binder.bind(interface, to=mock, scope=scope)
         return mock  # type: ignore
 
+    def bind_settings(self, settings: dict[str, Any]) -> Settings:
+        merged = merge_settings([unsafe_settings, settings])
+        new_settings = Settings(**merged)
+        self.test_injector.binder.bind(Settings, new_settings)
+        return new_settings
+
     def get(self, interface: type[T]) -> T:
         return self.test_injector.get(interface)