next.js

e820e92d - fext(next-core): inherit root layout segment config for the routes (#63683)

fext(next-core): inherit root layout segment config for the routes (#63683) ### What Supports root segment config inherit from layout. Currently route segment config only runs agasint own source, so individual route segment config works but if the config is set in layout level it is being ignored. PR introduces root segment and pass into each route if tree level have a corresponding layout. Closes PACK-2839