Type check JSON files

[Timer]

Revert #5614

[feysalikbal]

Hi, I want to work on this task.

[Timer]

@feysalikbal we appreciate the enthusiasm but we already have a PR lined up for this (just reverting one)!

However, this can't be merged until we're ready to release v3.

Hopefully you can find something else to contribute to, we look forward to it!

[feysalikbal]

OK Thanks :)