src: add `NODE_OPTIONS` support to .env
Work-in-progress.
Changes are done on top of https://github.com/nodejs/node/pull/48890
The changes that are unique to this PR: https://github.com/anonrig/node/compare/dotenv-support…anonrig:node:dotenv-support-with-node-options
Todo
-
Add tests for worker_threads -
Add tests for NODE_OPTIONS