Pre Release v0.4.0

Changelog

ed9f3fa feat!: add Flags in rule
d5963f6 feat: add registry for custom rule and formatters
345edb6 feat: allow empty scope in ScopeEnumRule
956a922 feat: check rule, formatter registered in config verify
e007af6 feat: init creates hooks dir in root git dir
28325db feat: separate cli commands and callbacks
cd42e21 feat: set allow-empty flag in default config
5e7424e fix: check for stdin pipe input
d25eff3 perf: use binary search in EnumRule
f46b51c refactor!: rename SetAndCheckArgument to Apply