[docs] Add missing changes and links to Changelog (#3655)

* changelog sweep

* Resolve a few conflicts

* Resolve more conflicts

* DadBattle

* Re-add @ianharrigan

* Add links to 0.5.0

* Add links and contributors to 0.4.1 and 0.4.0

* Add links to 0.3.3 and finishing touches

* Add and polish 0.5.3 changes

* Make spacing consistent