Speed up wiki scraping

[robotboy655]

This is different from #31, this PR aims to speed up the "initial" wiki scrape. It is way too slow right now.

Also wipe the output folder by default when running npm run scrape-wiki, so that files do not have duplicated data.

[luttje]

Hi there, thanks a bunch for contributing to this little project. I really appreciate you taking time form working on Garry's Mod to help out here.

IIRC me not wiping the output folder by default was so I could separately test the packing functionality on preexisting output (without accidentally wiping my "test data"). However since everything seem to work alright, there's no reason not to wipe now.

The scraping really is a lot faster thanks to you. I remember thinking taking the slow way would be better not to trigger any throttling on the wiki server. You coming in with this PR really helps, since I wouldn't have dared to make such a change myself.

Thanks again!

[luttje]

@all-contributors add @robotboy655 for code

[allcontributors]

@luttje

I've put up a pull request to add @robotboy655! 🎉