* Create SECURITY.md

* [experimental] auto-mark documentation PRs with labels

* revert #6544

* Sync RPM packages instructions to other docs languages

* Move tutorial to documentation with old content (for now)

* refactor installation guide a bit

* add ../en/getting_started/index.md

* Rename ya_metrica_task.md

* Rename ya_metrica_task.md

* Refactor Yandex.Metrica dataset description

* WIP on rewriting tutorial

* tmp commit

* lots of docs fixes

* partially revert c136bee4

* try to fix docs build in CI

* try to fix docs build in CI

* few minor improvements

* Quick refactoring of last portion of tutorial (not thoroughly tested though)

* fix link