src: add node_process.cc

Begin moving `process` object function definitions out of `node.cc` ... continuing the process of making `node.cc` smaller and easier to maintain. PR-URL: #21105 Reviewed-By: Gus Caplan <[email protected]> Reviewed-By: Refael Ackermann <[email protected]> Reviewed-By: Trivikram Kamat <[email protected]> Reviewed-By: Evan Lucas <[email protected]> Reviewed-By: Joyee Cheung <[email protected]> Backport-PR-URL: #21799 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Michaël Zasso <[email protected]>

Author: jasnell

node.gyp

@@ -350,6 +350,7 @@
 'src/node_platform.cc',
 'src/node_perf.cc',
 'src/node_postmortem_metadata.cc',
+'src/node_process.cc',
 'src/node_serdes.cc',
 'src/node_trace_events.cc',
 'src/node_types.cc',