Documentation: Guide on running Herb (Analyze/Formatter/Linter) in CI

[marcoroth]

It would be ideal to show examples and copy-paste snippets for for popular CI pipelines in the documentation in a new Guides section:

• GitHub Actions
• GitLab CI
• Bitbucket Pipelines

[marcoroth]

It might also be worth to mention/feature Reviewdog and other similar tools.

I wasn't familiar with it until @asilano mentioned it in #352 (comment)

[reysmalldev]

@marcoroth Do you still need this? I'm willing to do it.