* Refactored zinterstore, zunionstore commands and command traits
* Merge conflicts resolve, update cluster strategy test with new arguments
* Updated assertion in case if command executed faster then duration minimal threshold
* Added support for ZUNION command
* Added command link and description
Co-authored-by: Vladyslav Vildanov <vladyslavvildanov@Vladyslav-Vildanov-MacBook-Pro.local>