David Plankensteiner

Currently we have the `@cnumbers` macro for this, but we can just get rid of this once MTK properly supports complex numbers. As of yet, using `@parameters` from MTK will...

Currently, averages are symbolic functions with a `QNumber` argument, i.e. `avg(::QNumber)::CNumber`. Once the metadata system of `SymbolicUtils` is fixed, we can change that so that averages are directly represented in...