Module orientation

[muesli]

Since our connectors aren't symmetric, we need to be careful with the module orientation.

As visible in the assembly animation, currently the OLED module is facing backwards, when attached to the base below it (or the port access of the base module is facing forward, depending on how you want to look at it).

The simple workaround is obviously rotating the OLED module, but it's something we need to be aware of when designing modules in general.

We could also think about aligning the connectors symmetricly, even though that would break compatibility with the old design again.