* build: collapse all BUILD.gn modifications into the original GN file patch
* build: collapse all the js2c.py changes into a single patch with a good explanation
This points our node repo at upstream (nodejs/node) and uses the base node tag as the target ref. We then use our existing patch system and patch files to apply our changes on top of node. This unifies how we patch upstream repos and makes our node patches easier to reason, view, understand and most importantly reduce.
