General static observables

[malte-schueler]

Hi! As I see correctly, the static observables implemented so far are all observables which can be expressed in density operators. I would like to implement <L^2> and <J^2> for a multi-orbital anderson model but don't imidialtly see how to do so straightforwardly. Are there any plans to implement this? Or could you give any advice on how to proceed? Thanks!