Add Dark Souls 1-3 and Demon's Souls wiki entries

[in1tiate]

Depends on #400. Addresses #236, #298, #299, #301, #302

Left off the Dark Souls fandom wikis, because they're consolidated under the Dark Souls 1 fandom wiki, meaning it's not possible to separate queries.
Also left off Bloodborne pending support for bloodborne-wiki.com's software.

[KevinPayravi]

Thanks for putting this (and #400) together!

From this post, it appears that Wikidot's search has been down for over a year now, so redirects using the search endpoint will not work. We could change destination_search_path from /search:site/q/ to /, so that IWB redirects attempt to take the user straight to the corresponding article instead of through the search. The downside is that if the article name doesn't match exactly, the user will reach a 404 on Wikidot...and since the search doesn't work, the user will have to do some digging to find the article they want.

The DS Wikidot subscriptions have also lapsed, so the wikis are locked from editing + no HTTPs :/

Based on the above I'm inclined to put this on-hold until at least search is available. I wonder if the DS Wiki owner can be reached to see if the subscription can be resumed, and if one of the alternative search solutions can be added.