Enhancement: Enable `trailing_comma_in_multiline` fixer (#647)

* Enhancement: Enable and configure trailing_comma_in_multiline fixer

* Fix: Run 'make coding-standards'

Fix: Remove useless function

Closes GH-562.

Add Doc link to Intersection types (#486)

Georgian translation of the PHP 8.0 Announcement Page (#454)

Co-authored-by: Sergey Panteleev <sergey@php.net>