Editor: Fix InspectorPanel AddComponent popup crash

- Remove SeparatorText which causes PopStyleVar mismatch in ImGui
- Add stderr redirection for better error capture
- Add debug logging to InspectorPanel
- Fix EditorLayer commented out undefined functions

editor/src/Layers/EditorLayer.cpp

@@ -41,15 +41,16 @@ void EditorLayer::onUpdate(float dt) {
 void EditorLayer::onEvent(void* event) {
     ImGuiIO& io = ImGui::GetIO();
     
-    if (ImGui::IsKeyPressed(ImGuiKey_F5)) {
-        TogglePlay();
-    }
-    
-    if (ImGui::IsKeyPressed(ImGuiKey_F6)) {
-        if (GetEditorMode() != EditorMode::Edit) {
-            TogglePause();
-        }
-    }
+    // TODO: These functions don't exist - need to implement them
+    // if (ImGui::IsKeyPressed(ImGuiKey_F5)) {
+    //     TogglePlay();
+    // }
+    // 
+    // if (ImGui::IsKeyPressed(ImGuiKey_F6)) {
+    //     if (GetEditorMode() != EditorMode::Edit) {
+    //         TogglePause();
+    //     }
+    // }
 }
 
 void EditorLayer::onImGuiRender() {