refactor: handle io formatting more uniformly #729

Job	Run time
ash-ci / audit	33s
ash-ci / mix igniter.upgrade	0s
ash-ci / mix deps.get	14s
ash-ci / MIX_ENV=test mix.compile	32s
ash-ci / mix format --check-formatted	25s
ash-ci / mix docs	23s
ash-ci / mix spark.cheat_sheets --check	3s
ash-ci / mix sobelow	6s
ash-ci / Deploy docs to GitHub pages.	0s
ash-ci / mix spark.formatter --check	3s
ash-ci / MIX_ENV=dev mix.compile	17s
ash-ci / mix ash.codegen --check	0s
ash-ci / mix credo --strict	3s
ash-ci / mix dialyzer	2m 26s
ash-ci / mix test	1m 21s
ash-ci / mix deps.unlock --check-unused	24s
ash-ci / Release	0s
	6m 50s

Provide feedback