Swindle : Voltage translator merged

 The latest bunch of change was merged.

The main change is the addition of a voltage translator to allow operation with a lower voltage chip.

There is a jumper to select between native (3.3v) and translated (1.2,  1.5, ..) voltage

Example with a RP2040 + Carrier board with voltage translators

(They are a pain to solder btw, i put them too close to each others).

Only CH32V3xx and RP2040 for now !



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