Document or link to Ore 2.0 API about spongedocs

[Katrix]

Personally I'd like to keep the Ore API v2 docs in one place, not two (although docs is welcome to parse the swagger.json file and generate it from that).

I think a link to the new docs with a notice that the old docs are being deprecated would be enough. I also want to hold off on officially recommending API v2 over v1 for serious work until Ore 2.0.0 has been released.

Something else we might think of is to have some sort of Ore API v2 by example, or more detailed cos here.

[Inscrutable]

Keeping it in SpongeDocs means we can do minor edits more easily. It's not third-party content, so it does belong in there. We have six pages of Ore docs, some won't have to change much. We could reformat the remaining ones to more closely match the doc on Ore. Any opinions?

[Inscrutable]

We can just deprecate our old API pages and link to the new Swagger pages for Ore API if you prefer. Whenever it's ready to launch.