[ChangelogLinker] inspiration

[TomasVotruba]

Related to #822

Goals

• based on using + from keepachangelog

• respect Added/Fixed/Changed/Removed sections
  

• pick these sections by regex or other any custom function

• subheadlines features for monorepo

  

Sources

• 🚫 https://github.com/ins0/github-changelog-generator - takes too long (5 mins and counting...) to get some output

• ✔️ 🚫 https://github.com/github-changelog-generator/github-changelog-generator

  • very powerfull tool, great source of inspiration
  • 4 categories are present, but only by strict labeling :( Support all Types of changes listed in Keepachangelog 1.0.0 github-changelog-generator/github-changelog-generator#558

• ✔️ https://stackoverflow.com/questions/3523534/good-ways-to-manage-a-changelog-using-git

  • reference to github-changelog-generator/github-changelog-generator package

• 🚫 https://reddit.com/r/PHP/comments/4qqo41/how_do_you_guys_manage_your_changelog_for_your/

  • mostly opinions, not any positive significant references

• ✔️ 🚫 https://gist.github.com/Ocramius/5913172

  • bare dump, missing 4 categories
  • but simple code to inspire, ❤️ @thanks in the end of each PR

[TomasVotruba]

Moved to #822