Automate docs publication

[cristaloleg]

Currently docs (overview.md file to be exact) isn't updated automatically in this repo https://github.com/go-critic/go-critic.github.io but it can be 😄

To generate new docs you need to run make docs from this repo. And then add a PR/commit to the repo mentioned above. Looks like this can be automated via Github Actions, slightly hacky but should work https://github.community/t/triggering-by-other-repository/16163/4

[lasiar]

Diagram from #1375

Duplicate diagram

There were two ways:

1. Send file via dispatches
   props: simple
   cons: limit of size of file

2. Checkout this repo in actions of https://github.com/go-critic/go-critic.github.io and copy file
   props: no limit
   cons: need another token
   cons: job takes longer to complete

I chose the first option.