Given a running Arachne runtime which includes a Figwheel system, start a Figwheel REPL.

Note that because this function 'takes over' the primary REPL, it is incompatible with
nREPL-based Clojure REPLs. If you are in emacs, consider using an inferior-lisp based REPL (such
as inf-clojure). If you are in Cursive, consider switching your repl to "clojure.main in normal
JVM process"