Improve /help challenge for custom rules (#1695)
Improve /help challenge for custom rules (#1695)

* Add /battlerules for help challenge

I added the /battlerules for the help challenge and an alias for help (h) 
https://www.smogon.com/forums/threads/add-custom-rules-page-to-help-challenge.3674780/

* Update js/client-chat.js

Co-authored-by: Guangcong Luo <187562004ef700ef0b27f9ac3508605cd1fc58d2@gmail.com>

* Update js/client-chat.js

Co-authored-by: Guangcong Luo <187562004ef700ef0b27f9ac3508605cd1fc58d2@gmail.com>
Zarel/Pokemon-Showdown-Client,Zarel/Pokemon-Showdown-Client,Zarel/Pokemon-Showdown-Client,Zarel/Pokemon-Showdown-Client