WIP: Introduce multi-instance docs with docs and guides nav sections

[derektolliver]

Introduce multi-instance docs with docs and guides sections in the top nav.

@psikoi Want your feedback on this current instance of the docs when you get the chance. I think there are still some open questions:

1. What paths do we want the pages to follow? Currently introduction is at the base slug and the apis are all within a category which affects their path.
2. Do we already have content to fill out a few pages of the guides section? It might be nice to have some base ones to start with instead of leaving them with placeholders/under construction, but totally up to you.

Let me know if you have any feedback on this current implementation you'd like me to change.

Including some simple screenshots for quick reference:

Both of the guides pages are currently just placeholders.

[vercel]

@derektolliver is attempting to deploy a commit to the wiseoldman Team on Vercel.

A member of the Team first needs to authorize it.

[psikoi]

Ideally the structure of the URLS would be:

/ <- a landing page, just somewhere users can choose where they want to navigate to
- I'll design this later, dw about the contents, could be just an empty page for this PR

/api/ <-- api intro
/api/players/* <-- players endpoints and entities
/api/groups/* <-- groups endpoints and entities
...etc

/guides <-- guides intro
/guides/how-to-setup-something <-- guide

/faq <--- a page where we can (later) add a bunch of FAQs

[psikoi]

Reference for the type of layout I was thinking for the docs landing page btw: https://developer.redis.com/

Very simple, short summary at the top, big clickable cards underneath (that navigate to each of the areas)

[psikoi]

@derektolliver What's the status on this? 🤔

[MikaelSvanasbakken]

Looks like a neat thing to have @derektolliver are you able to finish this?