Styles up module directives!

This Style will expand multi-aliases/requires/imports/use and sort the directive within its groups (except uses, which cannot be sorted) It also adds a blank line after each directive group.

Credo rules

Rewrites for the following Credo rules:

• Credo.Check.Consistency.MultiAliasImportRequireUse (force expansion)
• Credo.Check.Readability.AliasOrder (we sort __MODULE__, which credo doesn't)
• Credo.Check.Readability.ModuleDoc (adds @moduledoc false if missing. includes *.exs files)
• Credo.Check.Readability.MultiAlias
• Credo.Check.Readability.StrictModuleLayout (see section below for details)
• Credo.Check.Readability.UnnecessaryAliasExpansion
• Credo.Check.Design.AliasUsage

Strict Layout

Modules directives are sorted into the following order:

• @shortdoc
• @moduledoc
• @behaviour
• use
• import
• alias
• require
• everything else (unchanged)