Fix some errors with meshrenderer moving to engine that gemini didnt have time to fix

Will have to resync how to load more meshes. Probably need a command to do it but for now not needed.

JulietApp/main.h

@@ -18,7 +18,7 @@ namespace Juliet
 class JulietApplication : public Juliet::IApplication
 {
   protected:
-    void Init() override;
+    void Init(Juliet::NonNullPtr<Juliet::Arena> arena) override;
     void Shutdown() override;
     void Update() override;
     bool IsRunning() override;
@@ -43,13 +43,12 @@ class JulietApplication : public Juliet::IApplication
     Juliet::HotReloadCode     GameCode         = {};
     Juliet::GraphicsPipeline* GraphicsPipeline = {};
     Juliet::Texture*          DepthBuffer      = {};
-    Juliet::GraphicsPipeline* SkyboxPipeline   = {};
     Juliet::Arena*            GameArena        = nullptr;
     Juliet::Arena*            GameScratchArena = nullptr;
 
-    int  AutoCloseFrameCount = -1;
-    bool Running             = false;
-    float CameraTime         = 0.0f;
+    int   AutoCloseFrameCount = -1;
+    bool  Running             = false;
+    float CameraTime          = 0.0f;
 };
 
 JulietApplication& GetEditorApplication();