Make the linter print better error messages

[ExE-Boss]

Depends on #2288

Fixes #2330
Fixes #2143

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Example result with a failed build

[ExE-Boss]

@Elchi3 I’ve now rebased this and #2155.

[Elchi3]

I've tested this and it works great. Good work!
I think it would be good to add ^0.6.0, though. What do you think?

[ExE-Boss]

review?(@Elchi3): I have now resolved all the merge conflicts with the master branch and updated ajv and better‑ajv‑errors to the latest versions.

Also, updating package‑lock.json was very annoying, as mdn‑confluence keeps failing to install with npm and I use pnpm for my day‑to‑day node package development (which also ignores the mdn‑confluence install issues), but npm ci requires that package.json and package‑lock.json match and pnpm can’t update npm’s package‑lock.json or npm‑shrinkwrap.json (this was also the primary reason why I wanted to avoid having to update yargs to version 12 in #2155).

P.S.: Please merge this before more annoying merge conflicts happen.

[Elchi3]

One question remaining here. Really close to land this now, though. Thanks again for your work! 👍

[Elchi3]

Cool! \o/