Adding WNC sentence type

[jarrod817]

No description provided.

[jarrod817]

I would like to propose adding the WNC sentence type.

[elpiel]

Only a minor thing regarding the docs and I don't have any feedback on the actual implementation.

Once again thank you for you contribution!

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (4e10c12) 77.51% compared to head (099bd4c) 77.62%.

Files	Patch %	Lines
src/sentences/wnc.rs	85.71%	3 Missing ⚠️
src/parser.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #110      +/-   ##
==========================================
+ Coverage   77.51%   77.62%   +0.11%     
==========================================
  Files          33       34       +1     
  Lines        1223     1247      +24     
==========================================
+ Hits          948      968      +20     
- Misses        275      279       +4     

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[jarrod817]

Added documentation

[elpiel]

Ok, so I took a look again this morning and I also remembered a few things.
Please add these things to the PR:

• A feature for the sentence to be enabled in Cargo.toml (enabled for waypoint feature too)
• add the example sentence in all_supported_messages.rs test

I've also suggested changes to the docs to resemble other places. I do wish to make the docs consistent across the crate eventually.

[elpiel]

I've also fixed the MSRV and all the warnings so you should be good to go if your code follows rustfmt/clippy.