pre release

UART upload enhancements. (#261)

* UART upload enhancements.

New serial read helper intruduced to help timeout handling.
PySerial class does not handle timeouts correctly in all
cases. This also makes delimiter definitions much easier which
helps to detect different situations.

Co-Authored-By: Rejd <Rejdukien@users.noreply.github.com>

* UART upload cleanup and ReadLine renamed to SerialHelper

* UART upload script fix

* Passthrough init optimization

Co-authored-by: Rejd <Rejdukien@users.noreply.github.com>