Move piggui networking code into a module or crate

[andrewdavidmackenzie]

This would enable the use of the code to connect and interact with a piglet/porky to be used in other places, such as a CLI, or integration with HomeAssistant or other apps, without having to do the networking part all over again.

Problem would be the tch_helper and iroh_helper code, and some serializations/deserialization, maybe some file loading and saving methods also.

[andrewdavidmackenzie]

Probably would make sense to implement #505 first

[andrewdavidmackenzie]

Not sure why I didn't do a module in that networking folder.

If I do that it could be merged and used by both piggui and piglet