Add 'Goto entity' support for the new Editor camera (#743)

* add find entity in viewport functionality to new camera

* fix AZ_CVAR usage

* updates following review feedback

- updated comment styles from /// to //!
- retrieve fov of camera (add test for fov access)

* update namespace naming, fix AZ_CVAR usage

* update missed namespace and use AZ::Transform::CreateLookAt

* add missing include

* move EditorViewportSettings to EditorLib

* update DLL import/export API and rename namespace usage

Code/Sandbox/Editor/ModernViewportCameraController.h

@@ -12,6 +12,8 @@
 
 #pragma once
 
+#include <ModernViewportCameraControllerRequestBus.h>
+
 #include <Atom/RPI.Public/ViewportContext.h>
 #include <AzFramework/Entity/EntityDebugDisplayBus.h>
 #include <AzFramework/Viewport/CameraInput.h>
@@ -36,6 +38,7 @@ namespace SandboxEditor
 
     class ModernViewportCameraControllerInstance final
         : public AzFramework::MultiViewportControllerInstanceInterface<ModernViewportCameraController>,
+          public ModernViewportCameraControllerRequestBus::Handler,
           private AzFramework::ViewportDebugDisplayEventBus::Handler
     {
     public:
@@ -46,10 +49,13 @@ namespace SandboxEditor
         bool HandleInputChannelEvent(const AzFramework::ViewportControllerInputEvent& event) override;
         void UpdateViewport(const AzFramework::ViewportControllerUpdateEvent& event) override;
 
+        // ModernViewportCameraControllerRequestBus overrides ...
+        void InterpolateToTransform(const AZ::Transform& worldFromLocal) override;
+
+    private:
         // AzFramework::ViewportDebugDisplayEventBus overrides ...
         void DisplayViewport(const AzFramework::ViewportInfo& viewportInfo, AzFramework::DebugDisplayRequests& debugDisplay) override;
 
-    private:
         enum class CameraMode
         {
             Control,