* updates to better support showing/hiding viewport ui when grid snapping is enabled/disabled
* connect up editor settings callbacks
* minor polish changes
* api rename
* updates following review feedback
* ensure the new camera respects changing ui values and move camera settings to the settings registry
* factor out creation of modular camera controller
* small updates before posting PR
* updates following review feedback
* updates following review feedback
* 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
* add overload to ActionManager to support capturing an AZStd::function
* move snapping settings to new settings registry
* remove unneeded reference in ViewportSettings
* move viewport setting function implementations to .cpp file
* add more sensible default values for snapping
* fix variable name for angle snapping
* remove const from function prototype value parameters
* add import/export api for free functions
* change from std::bind to a lambda
* remove redundant const for constexpr string_view
* add AZStd alias for std::abs
Tom Hulton-Harrop