TCP/UDP support via smoltcp

[arihant2math]

I suggest using https://github.com/smoltcp-rs/smoltcp, seeing as it is quite well developed, and that other OSes have used it (although I suppose they have more control over their syscall interface). I think a first step would be getting an example to run on the kernel level before exposing some syscalls.

[arihant2math]

The problem I'm seeing here is the rest of the I/O will be async, but this portion would be sync. I feel like this would lead to some conflicts later down the line. We might be able to circumvent this by implementing the socket layer ourselves.

[arihant2math]

Nevermind, seems like https://crates.io/crates/embassy-net is an async implementation.