extract alias usage

[novaugust]

Write a Styler style that does the work of Credo.Check.Design.AliasUsage, lifting deeply nested aliases by aliasing them.

Notably, even if you're running credo's AliasUsage, styler will fix a lot more things.
This is because styler is fixing things that credo ignores:

1. credo ignores @module_attribute A.B.C.f() due to a mistaken report that dialyzer can't understand aliases
2. credo only looks for deep modules being invoked. apply(A.B.C, :f, []) doesn't set credo off. (credo does complain if the module is the only argument to a function call)

Yes, I thought of at least some of the cases where it shouldn't do that and implemented safeguards :)

🚢

pretty sure this really will need configuration options to add more excluded namespaces than the stdlib (Plug for instance), but i'm merging to main as is and will do that as its own followup since it touches Styler itself

• FUTURE WORK add a configuration option to prevent conflict with libraries styler: [alias_lifting_exclude: [Plug, GetText, ...]]
• rewrite all aliases? Credo only warns on function calls, or if the alias is the only argument to a function call - the intention was to warn on any alias being used as an arg (... why arg?). i had all aliases rewriting for a bit, but you maybe need to carve out exemptions (dont go into quote blocks)
• dont go into quote blocks ?
• don't extract aliases with unquotes in them
• assert new aliases don't move comments
• there's a bug where submodules can hit conflicts

[novaugust]

going to have to make this configurable probably 🤔

[novaugust]

welcome to 2024!