So, basically, I need to get the parameters FROM the programs (when
selected or sweeping though them thanks to a button) and either change
the CC/OSC accordingly on the midi/osc controller or use mididings (or
equivalent) to map things properly.

Simply put, is there a way to get a list of hosts, a list of effects
within host, a list of parameters within effect, and the value of a
given parameter ? Oh. And the names or any kind of ID would be nice.