Create a config option to make extracted defs and functions public per default

**Is your feature request related to a problem? Please describe.**
Since we are not using the visibility attribute in our codebase, I'm always frustrated when I extract a `def` or a function, and I need to explicitly remove the `^:private` or change the `defn-` to `defn`.

**Describe the solution you'd like**
Have an option in the config to make the extracted `def` or `defn` public by default.

**Describe alternatives you've considered**
Manually changing the visibility whenever the extract action has been used.

**Additional context**
https://clojurians.slack.com/archives/CPABC1H61/p1771338189656739?thread_ts=1771338095.642159&cid=CPABC1H61