feat: assert/deassert limit switch in bridged mode

The first implementation was strictly based on how the ZMX crate used to behave. When the limit switch was in bridged mode, the limit switch signal was permanently active, regardless of the opener/closer setting. However, it turned out to be useful for testing purposes to be able to set the signal on the panel hard to LOW.

With the new implementation, the limit switch signal in bridged mode is permanently LOW when the switch is set as opener and permanently HIGH as closer.