[DEV] JS formatting and recommendation

[Soare-Robert-Daniel]

Problem

With the merge of #943 we will have access to a more advanced linting and problem detection.

feedzy-rss-feeds/.github/workflows/test-lint-js.yml

Line 29 in 6838ed4

run: npm run lint:js || true # Remove `|| true` when working on https://github.com/Codeinwp/feedzy-rss-feeds/issues/948

We should apply them.