`edn-mode`: Support function-style indentation for embedded logic

I wanted to highlight a specific use case for EDN files regarding
function calls. We use the 'clip' library to describe system
components, which involves embedding function calls directly
within EDN via tagged literals.

Example of the syntax:
https://github.com/juxt/clip?tab=readme-ov-file#use-with-edn

_Originally posted by @rrudakov in https://github.com/clojure-emacs/clojure-mode/issues/691#issuecomment-3932582507_