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

src/gui_2.py

@@ -639,9 +639,9 @@ class App:
       self._tool_log_cache = log_raw
     self._tool_log_dirty = False
    
-   if self.show_windows.get("Context Hub", False):
-    exp, opened = imgui.begin("Context Hub", self.show_windows["Context Hub"])
-    self.show_windows["Context Hub"] = bool(opened)
+   if self.show_windows.get("Project Settings", False):
+    exp, opened = imgui.begin("Project Settings", self.show_windows["Project Settings"])
+    self.show_windows["Project Settings"] = bool(opened)
     if exp:
      if imgui.begin_tab_bar('context_hub_tabs'):
       if imgui.begin_tab_item('Projects')[0]: