Make debugging a runtime option via set_option

[axic]

No description provided.

[aarlt]

Is this referring to that debugging should not be enabled/disabled through HERA_DEBUGGING anymore? So that debugging is basically always enabled (from the symbols point of view), where only runtime-checks will decide whether something should be done or not? Or is it meant as a third option, e.g. -DHERA_DEBUGGING=ON will enable this statically, where something like -DHERA_DEBUGGING=RUNTIME will basically enabling the debugging subsystem, but its basically "disabled" by default, where it can be enable/disabled again through set_option?

[axic]

Yep!

Though I would say this isn't a priority right now.