This iterates on docs a bit. Once noticing <remarks> doesn't render after the first one, I realized we were dropping ref links...and it'd be better if they were clickable. This globally makes them clickable from intellisense hovers.

…2108)

Reverts #2100

This was aimed to be merged _after_ #2098 landed, my fault. Reverting out for that to happen.

…2109)

Repeat of #2100, for after #2071 goes in.

This does a few things globally to the interfaces:
- De-dupes `<remarks>` since evidently past the first one doesn't count/render
- Links our redis command links (and all others) so they're easily clickable!
- Moves a few types to proper class files
- In places sync/async methods are adjacent, utilizes `<inheritdoc cref="" /> to de-dupe
- ...and some other misc URL cleanup throughout.

In general: docs only change - I think we should merge this as-is to help PRs coming in, then I'll continue to iterate on docs.