Refactoring, tests and performance increase

[peterkrull]

Hello. I have made some changes in my own fork.

• Made SBusPacket struct entries public
• Added feature to support embedded_hal::serial::Read<u8> trait
• Extensive use of ? operator during try_parse
• Fixed is_flag_set seemingly not doing what it was supposed to
• Simplified bit-shifting section, parsing is ~60% faster on an RP2040

Of course feel free to change the package description back to how it was.

[zklapow]

Thanks for this peter, I hope you don't mind I updated the cargo.toml here to include us both as authors and link to this git repo (given you are PRing here!)

[peterkrull]

That's perfectly fine. I should also add, I removed the Taranis related file, since it did not seem too relevant for the purpose of the crate

[peterkrull]

Hey, just want to say this never got merged :)