Formatting/serialization support

[elpiel]

• defmt Support defmt #92

Other formats we could support (share your thoughts below):

• serde Add serde support #102

• bincode

• ufmt defmt seems to be the go-to solution nowadays, this won't be implemented

• All of these formats should be optionally configured with a feature of the crate

[k-bx]

For my purposes I needed to modify existing NMEA message into a new NMEA message, and by my surprise, I didn't find a way to display GgaData as str. Is this considered as part of this issue or a separate one? Thank you

[elpiel]

It currently hasn't been considered part of this issue but it can be included.

The challenging part is that this is no longer a parsing job.

I do want to make this feature, however, there might be some challenges in implementing Display for all sentences ( like accuracy of floating numbers).

Are you willing to give a try with a few sentences and open a PR?

[k-bx]

Made a quick and dirty API for anyone interested #137

By no means is it a proposal, just something that works on a limited subset of a real world problem