feat(remotes): add remotes and configs

[NikitaCOEUR]

Closes # (issue)

No issues closed by this, but a complement of : #343 /
#420

⚡ Summary

Evolution of remote configuration, enabling the integration of multiple configurations from one or more different repositories.

Example :

# lefthook.yml

remotes:
  - git_url: git@github.com:evilmartians/remote
    ref: v1.0.0
    configs:
      - examples/ruby-linter.yml
      - examples/test.yml
  - git_url : https://github.com:example/repository
    configs:
      - lefthooks/pre_commit.yml
      - lefthooks/post_merge.yml
  - git_url : https://github.com:example2/repository2
    ref: specific_branch
    configs:
      - example/pre-push.yml

I have retained the old functionality with a single remote and a single config, which is still operational (but deprecated).

I needed to add an exclusion of gocyclo for the TestLoad function (internal/config/load_test.go) because it was reporting excessively high complexity. However, it doesn't seem critical since it's an addition of a test for the new feature.

Additionally, I tried to add deprecation messages for those still using 'remote' and 'config,' but it breaks the tests. Do you have a solution to avoid this?

I hope this work suits you well; feel free to provide feedback if needed!

☑️ Checklist

• Check locally
• Add tests
• Add documentation

[mrexox]

Wow, that's an amazing work! Thank you a lot! I will take a look at the PR this week and come back with the feedback.

[mrexox]

Amazing work! Thank you for the PR. I have fixed a few places that I considered important. I think the PR is pretty done. I will take a look at it one more time a bit later and merge it.

The only concern for me is merging extends for different remotes. I will try to figure out how to fix it (if I reproduce this issue of course)

[mrexox]

Looks like we will extend the same things multiple times, and if files from different remotes have extends it will break here.

[mrexox]

Ok, I've tested this concern and I coundn't reproduce an error, because extends get replaced after merging each remote. That's fine. I will polish the PR a little bit and prepare it for the release.

[mrexox]

This can be done in load.go