Add TTM sentence parse support

[Tapped]

#54 Add TTM sentence parse support

TTM is a stand-alone feature, but part of a new feature called "radar", when other radar messages as TLL or TLB is introduced.

[elpiel]

Thank you for your PR! Looks good to me!

Could you do 2 more things to complete it:

1. Add the example sentence in the TtmData docs as Example (you can check some of the other sentences for this
2. Add the example in the https://github.com/AeroRust/nmea/blob/main/tests/all_supported_messages.rs test

[Tapped]

@elpiel Thank you, I fixed your suggestions!

[elpiel]

@elpiel Thank you, I fixed your suggestions!

I'm not sure if you are aware but the CI fails.

[Tapped]

@elpiel
Yeah I noticed, but the errors seems to be unrelated to this PR.

I suspect its caused by an update of clippy. I'll make a separate PR to fix those errors, that I assume fails on latest main as well.

See for example:
https://github.com/AeroRust/nmea/actions/runs/9164588924/job/25378071147?pr=128#step:5:65

[Tapped]

I'm not sure what to do with the codecov failing?

[elpiel]

Nothing, I will find some time to investigate it.

Thank you once again for your contributions and patience!

If you are looking for more fun on the nmea crate, there are a few key features that will make the crate very useful for embedded platforms.