Setup npm package 🚀

[jeparlefrancais]

This PR creates a package.json to publish the project to npm.

Github workflow

I added a workflow file to auto-release and publish to npm. This action can be dispatched from the GitHub website, you simply enter the version like v1.0.0 and it will publish to npm, create a tag and create a new release.

To make it work, the repo needs a secret NPM_TOKEN that can publish to npm. Also, I think that if we are going to push the package as a scoped, the action needs to use the NODE_AUTH_TOKEN env variable instead of NPM_AUTH_TOKEN to pass the token. I tried to publish my first non-scoped package with NODE_AUTH_TOKEN but it kept failing and found out that I needed the other variable (see actions/setup-node#81 (comment))

To publish on Wally, there also need to be a secret WALLY_ACCESS_TOKEN.

Darklua setup

I added darklua to be able to use string/path requires. This makes it possible to re-use the package in a lot more Lua environments.

The release workflow automatically builds a rbxm model and a bundled Lua file. Those asset are automatically joined to releases when publishing a version with the GitHub workflow.

[grilme99]

Sorry about the delay. Thanks for this!