AIS NMEA messages

# AIS messages

We're missing support for AIS messages and thankfully there's a crate build for them already!

I've already opened an issue regarding the integration in the NMEA crate (https://github.com/squidpickles/ais/issues/8) and the maintainer is looking into `no_std` support for the crate (https://github.com/squidpickles/ais/issues/9)

We should integrate the `ais` crate or use it as a dependency inside `nmea`.

As @squidpickles mentioned in a comment (https://github.com/squidpickles/ais/issues/8#issuecomment-1226790807):
> Probably do want to keep this existing on its own, too, as some folks (myself included) only have real use for the AIS portion at the moment.
However, we can look into another solution, instead of keeping the crates separate - enabling message parsing by features gates.

# Features proposal

Here's a WIP list of features we can use to separate the different message parsing of the crate and allow people to only use a certain message(s):

- ais
- bwc
- gga
- gll
- gns
- gsa
- gsv
- rmc
- txt
- vtg