feat: moving and resizing of quad/cylinder video layers

[zhixiangteoh]

Idea:

Something like this:

Note: the move icon serves as a visual cue (user can click anywhere in the video to move it)

Moving (use case):

• User points controller ray at anywhere (but the toolbar and resize icons) in the video
• User presses and holds down trigger
• While trigger held down, user moves video around by moving controller

Resizing (use case):

• User points controller ray at any corner resize icons of the video
• User presses and holds down trigger
• While trigger held down, user resizes video with aspect ratio maintained