lint: javascript

[dcreey]

Add a new action for linting javascript/typescript/node based code.

• Runs on every package.json in the repo. Shards to one vm per package.json
• Runs npm run lint if a lint command is defined in the package.json
• Otherwise runs npx eslint . if an eslint config is present.
• Otherwise does nothing and instead prints a notice to add a "lint" command to your package.json or add an eslint config.
• NOTE: I considered using gts - but it just adds a lint command to your package.json and is not CI friendly as it generates a lot of source code if you haven't used it before in a repo.
• TODO: lint standalone js

Tested on github-token-minter by manually adding: abcxyz/github-token-minter#207

[sethvargo]

Got em!

[dcreey]

Got em!

Alas. A victim of my own design