Create a GHA workflow to upload docs

[kraenhansen]

Prior to the merge of #5937 we had workflow generating and publishing our docs.

We need a new workflow (generating a typedoc website by invoking the npm run docs --workspace realm command) publishing the docs as part of the release process of the package.

[sync-by-unito]

➤ Chris Bush commented:

Existing workflow to base off: https://github.com/realm/realm-js/blob/main/.github/workflows/docs-publish-realm-react.yml