Breaking: @trackunit/react-drawer adds useDrawer, DrawerHeader, and variants
@trackunit/react-drawer has been reworked to align with Sheet and Modal: a new useDrawer hook owns state and dismiss, a new DrawerHeader component provides the standard toolbar, and the panel now has explicit variant="default" | "modal" semantics. Legacy inline props on <Drawer /> (open, onClose, onOpen, hasOverlay, keepMountedWhenClosed) and the DrawerToggle component have been removed.