feat(gui): Remove Context Presets tab from Project Settings

Context Presets tab removed from Project Settings panel.
The _render_context_presets_panel method call is removed from the tab bar.
Context presets functionality will be re-introduced in Discussion Hub -> Context Composition tab.

src/gui_2.py

@@ -650,9 +650,6 @@ class App:
       if imgui.begin_tab_item('Paths')[0]:
        self._render_paths_panel()
        imgui.end_tab_item()
-      if imgui.begin_tab_item('Context Presets')[0]:
-       self._render_context_presets_panel()
-       imgui.end_tab_item()
       imgui.end_tab_bar()
     imgui.end()
    if self.show_windows.get("Files & Media", False):