🚀 Feature: Telnyx SMS

[dcowan-london]

🔖 Feature description

Support Telnyx (https://developers.telnyx.com/docs/v2/messaging/quickstarts/sending-sms-and-mms) for sending SMS.

🎤 Pitch

I'd like Telnyx to be supported.

👀 Have you spent some time to check if this issue has been raised before?

• I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• I have read the Code of Conduct

[stnguyen90]

@dcowan-london, thanks for creating this issue! 🙏🏼 This looks like an interesting provider!