* fix: rework `setupShellCommand`
* move all logic to separate function so we can test that later
* split `step.Shell` and `step.WorkingDirectory` setup into own funcs
* general cleanup of function
* use `ActPath` to not collide with checked out repository
* use `shellquote.Split()` instead of `strings.Fields()` for better command split
* replace single string concat with `fmt`
Signed-off-by: hackercat <me@hackerc.at>
* lint(editorconfig): ignore *_test.go due to mixed style
Signed-off-by: hackercat <me@hackerc.at>
