action to send an SMS

[sds100]

Developer TODO (don't remove)

• create new branch. put issue number at start of name
• option to send a predetermined message or show a prompt to choose the message.
• two actions to instantly send the message or open the sms in the messaging app before sending. "Send SMS" and "Compose SMS"
• update documentation
• squash and merge
• delete branch

[GL513]

Possibly also have the option to either send it automatically, or to open the messaging app so the user can send it themselves.

[sds100]

yeah