Support other messengers

[ialokim]

I would love to use a similar feature for the Signal messenger. It should be possible to open Signal conversations with an smsto:// call.

Now, I'm wondering what you prefer: Do you want to support other messengers within this app too (this would include renaming the app and restructuring some UI) or would you prefer me to fork your app and publish a separate "Open in Signal" app?

[Korb]

...and Telegram (ex. https://t.me/+12345678901).