* feat: adds a transmit and receive i2c method
* fix: address the i2c transmit and receive length on u16
* Add AVR/LUFA implementation
Didn't add a progmem version, since that would only apply to receive.
Figured it wasn't worth it, but can add.
* Rearrange order of functions
* Add docs
* Fix doc gen error
* Fix lint issues
* fix more lint issues