Feat add epaper 2in9 board

[bonnyr]

A new 2.9" ePaper board to go with the WS29v2 custom chip (alpha)

This is the same PR as #9 but since I cannot change the source branch in that PR and since the branch name had changed to reflect a more generic board name, this one was created.

@urish - in addition to the other discussion in #9 I would like to propose that the chip version mentioned as dependency and points to a particular release on GitHub be a separate field - version with a UI that allows the user to select from available versions since this board definition is likely to have a different lifecycle than the chip implementing the functionality.

This could be a feature you're already thinking about for wokwi/wokwi-features#302 so maybe this is not needed

[urish]

@urish - in addition to the other discussion in #9 I would like to propose that the chip version mentioned as dependency and points to a particular release on GitHub be a separate field - version with a UI that allows the user to select from available versions since this board definition is likely to have a different lifecycle than the chip implementing the functionality.

Good point - haven't thought about this yet. Dependency management is hard. Boards add nested dependencies, which is where complexity even grows :)