Merge main into the FROST mirror

Resolves the conflict with `Remove Sei support (#998)`, the single
commit main had gained since this branch forked.

Sei source, tests and generated pages take main's deletion. This branch
had only touched them incidentally, adding the repo-wide
`supportsTaprootDeposits()` interface method that every chain
implementation gained; with the implementation gone there is nothing
left to implement it. No dangling reference to the module remains.

`typescript/api-reference` is regenerated with typedoc rather than
hand-merged, since it is build output: three pages conflicted on
content and six Sei pages are dropped.

SDK suite: 874 passing, 0 failing.

Author: mswilkison