Throw error on incorrect cairo linting

[Orland0x]

Need to throw error if the code was not correctly linted so that the linting github action will fail in that scenario. The -c param is required for this.

[pscott]

Is the return value of cairo-format checked somewhere ?

[pscott]

I added a commit which does two things:

1. Add a check-format script to the package.json file, and renamed the lint script to format. This way developers can run yarn format to actually format the files, and our CI can use check-format to ensure correct formating.
2. Modify our github action to call check-format rather than lint :)

I've force-pushed the branch because I tested my work with two dummy commits that i removed to keep a clean history. Here's a screenshot to prove my claim https://imgur.com/a/IpznhxJ