WIP: feat: add commitlint config command

[marionebl]

Add a commitlint config command

Description

This adds a new command to commitlint cli that prints the current fully resolved config to stdout.

Via --format=json the output can be optimized for consuming machinery. The format option is introduced to the plain commlint command, too.

Motivation and Context

Tools such as commitlintbot and commitlint-bot require access to the resolved config while being unable to execute configs with io (e.g. lerna).

A workaround has been outlined that requires a tool on CI (where io is possible) to send fully resolved config to a bot, which in turn can use this config to lint commits / PR titles.

Usage examples

$ commitlint config
extends:    
config-lerna
├── config-conventional
└── config-lerna-scopes
parser:      angular
Rules:
  - type-enum: ci, 

How Has This Been Tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

ToDO

• commitlint config
• Tests for commitlint config
• JSON output from parent command
• Tests for commitlint --format=json

[marionebl]

Did a prerelease publish via the next tag, should pull 5.3.0-0