[FR] [gazelle] - generate js_binary|test targets for npm package bins

[jbedard]

What is the current behavior?

Not supported

Describe the feature

Today gazelle generates rules to compile + package ts and js. Those should then be consumable by binary + test targets such as jest_test or generic entries from npm package bin entries.

[Aghassi]

As a user, some notes:

1. I would expect I could use gazelle to generate any npm package that rules_js produces this way
2. I would expect that I can use map_kind on any of these packages so I can provide macros for them that do some extra leg work for my users such that it requires less setup

[jbedard]

Ideas for potential API:

# gazelle:js_pkg_bin @npm//examples/webpack_cli webpack_cli target_x **/*.ts

To produce:

load("@npm//examples/webpack_cli:webpack-cli/package_json.bzl", "bin")

bin.webpack_cli(
  name = "target_x",
  data = [... each individual file matching the glob ...]
)