Description

This reverts the revert of #1521. It aims to fix the module resolution we're seeing when locating .proto files for lightning by locating them before webpack runs and storing them in an environment variable LIGHTNING_MODULE_PATH.

After spending most of the day trying to write my own version of nextjs's module resolution, I realized we were just using tsx weirdly by making modules of our own directories. Not doing that allows require.resolve to work in worker and avoid some of the weird tricks we used to deal with CJS deps in the worker.

I still need to test if this works in production, but it should because require.resolve - when not using webpack - returns an absolute path.