Add support for `rewardgift`

**Is your feature request related to a problem? Please describe.**
Can't simulate this USERNOTICE

**Describe the solution you'd like**
Would like to be able to trigger it via chat command

**Additional context**
Key params:
* `msg-param-domain`
* `msg-param-trigger-type`
* `msg-param-selected-count`
* `msg-param-total-reward-count`
* `msg-param-trigger-amount`
