a proposal for a type of connection that allows server-client + client-client connections.
the connectors are designed in a way that the pin functions are arranged symetrically. the benefit of this approach is that one does not need to worry about interfaces if a connection requires a crossed ( e.g SPI, I2C ) cable or a direct connection ( e.g UART/serial ).
@note(2022-02-22, the principle only works if pins are arranged on a single row. the implementation on KLST_CORE + KLST_TINY is flawed because it uses 2 row connectors)