Preliminary work to split read-only environment from Script.
Cosmetics.
Cosmetics.
Remove user stack from executor.
Dead code.
Num instance for User.
Cosmetics.
Annotate with retries.
Cosmetics.
Remove reactions stack from executor.
Haddocks that make sense.
No StateT in Executor #57
Move templates to common settings.
Remove Run from public API.
Update biegunka init template.