Type Alias ButtonType

Represents a mouse button identifier.

Button types indicate which physical mouse button or wheel action triggered an event.

Button	Description
`'none'`	No button pressed (used for movement events)
`'left'`	Primary (left) mouse button
`'middle'`	Middle mouse button (often the scroll wheel click)
`'right'`	Secondary (right) mouse button
`'wheel-up'`	Mouse wheel scrolled up/away from user
`'wheel-down'`	Mouse wheel scrolled down/toward user
`'wheel-left'`	Mouse wheel scrolled left (horizontal scroll)
`'wheel-right'`	Mouse wheel scrolled right (horizontal scroll)
`'back'`	Back button (typically side button on mice with 5+ buttons)
`'forward'`	Forward button (typically side button on mice with 5+ buttons)
`'unknown'`	Unknown button type (fallback for unrecognized codes)