Function centerElement

centerElement(
    elementWidth: number,
    elementHeight: number,
    containerWidth: number,
    containerHeight: number,
): Position
Helper function to center element in container
Parameters
- elementWidth: number
  Width of element
- elementHeight: number
  Height of element
- containerWidth: number
  Width of container
- containerHeight: number
  Height of container
Returns Position
Centered position
- Defined in systems/LayoutSystem.ts:461