feat(service): Add Twilio service

[nikoksr]

Is your feature request related to a problem? Please describe.

Missing support for Twilio.

Describe the solution you'd like

Implement a notification service and use existing services such as WhatsApp as a guide for implementation. At the time writing this, kevinburke/twilio-go seems to be the best client library for our service.

[himsngh]

Hello @nikoksr , I would like to work on this feature

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[SioJL13]

Hello @nikoksr, is this issue still up for grabs? thanks!

[svaloumas]

Hey @nikoksr, is anyone working on this, or may I pick it up?

[nikoksr]

@svaloumas not to my knownledge. As I have now noticed, I have very unfortunately missed the above request... but well, due to my inattention you're very welcome to pick up the issue; thanks again!