usage_rules

[matt-beanland]

setup so includes usage_rules (not produces them, since examples has no downstream consumer)

[matt-beanland]

branched from a check in on 32-calculations-and-aggregates to get deps update, since diffo 2.2 has usage_rules now, as does ash_neo4j.

using igniter we may be able to get the formatters installed too.

[matt-beanland]

used: mix igniter.setup to setup igniter.
used: mix igniter.install usage_rules to install usage_rules.

[matt-beanland]

formatter - removed locals_without_parens and added import_deps. Ran formatter