feat(gui): Rename Context Hub to Project Settings

- gui_2.py: Window title changed to 'Project Settings'
- app_controller.py: show_windows key updated
- Updated tests to reference new name

tests/test_project_settings_rename.py

@@ -0,0 +1,22 @@
+import pytest
+import inspect
+
+
+def test_context_hub_renamed_to_project_settings():
+    import src.gui_2 as gui_2
+
+    source = inspect.getsource(gui_2.App._gui_func)
+    assert "Project Settings" in source, (
+        "Context Hub should be renamed to Project Settings"
+    )
+    assert '"Context Hub"' not in source, '"Context Hub" string should be removed'
+
+
+def test_show_windows_key_updated():
+    import src.app_controller as app_controller
+
+    source = inspect.getsource(app_controller.AppController)
+    assert '"Project Settings"' in source or "'Project Settings'" in source, (
+        "show_windows key should be Project Settings"
+    )
+    assert '"Context Hub"' not in source, '"Context Hub" key should be removed'