Implement common interfaces with PARL_IO

[bugadani]

I'd love to see adapters that turn PARL_IO into (maybe DMA-driven) SPI, UART and whatever else it can implement.

[Dominaezzz]

Are you still interested in this btw? (I was attempting to read from a camera but I hit https://github.com/esp-rs/esp-hal/issues/1867).

I ask because I don't know if you'd want these sort of examples here in esp-hal or would prefer them in https://github.com/esp-rs/esp-hal-community .

[bugadani]

I almost forgot this. I wanted to write an SPI driver based on PARL_IO but never got to it. I think such additions would be ideal in one or more community crates.