[Feature Request][WEBJS] Pin and Unpin Message in Group Chat

[morning-bird]

Is your feature request related to a problem? Please describe.
In a group, I need to pin a poll message manually the next day after created it at 9am. It will be really helpful if this flow could be automated.

Describe the solution you'd like
I kindly request the addition of APIs that would allow me to pin or unpin a message in a group chat.

Describe alternatives you've considered
I am using webjs to pin it, so it isn't ideal because now in my whatsapp there is 2 linked device, 1 to handle message flow (waha), 1 to handle pin and unpin flow (webjs). I really appreciate if this APIs could be implemented in Waha.