E2EE implementation for other SMS apps

Hi! Would love to integrate the E2EE as an optional system into [quik](https://github.com/octoshrimpy/quik). I've been thinking about how to do it on my own for a while, and best I came to was to use [stegcloak](https://github.com/KuroLabs/stegcloak) for hiding the keys within a single SMS. that would allow the handshake to happen completely behind the scenes, with only a couple prompts for the user: `e2ee requested: continue? ignore?`

I think what you have here with deku is very special and if implemented on more FOSS SMS apps, could be a good direction for privacy of general public. Would love to chat about this more. :)