Consider using the bin field from package.json for specs derived from NodeModuleSpec

[jtpio]

Elevator Pitch

Originally discussed in #1064.

Currently NodeModuleSpec specs use the scripts field, for example:

jupyterlab-lsp/python_packages/jupyter_lsp/jupyter_lsp/specs/typescript_language_server.py

Line 7 in 18d5c8c

script = ["lib", "cli.js"]

Motivation

Package maintainers might rename underlying files (as noticed in #1064).

Reusing the script referenced by the bin field might prove more reliable over time.

Design Ideas

Maybe some unknown as to what would happen if there are multiple bin entries.