Override display format

[ohno]

I want to display variable names when displaying struct. Please refer to the discourse.

Current:

julia> HO = HarmonicOscillator(k=1.0, m=1.0, ℏ=1.0)
HarmonicOscillator(1.0, 1.0, 1.0)

Goal:

julia> HO = HarmonicOscillator(k=1.0, m=1.0, ℏ=1.0)
HarmonicOscillator(k=1.0, m=1.0, ℏ=1.0)

Overwriting dump() to Base.show() is enough if we ignore executability:

julia> Base.show(io::IO,model::HarmonicOscillator) = dump(model)

julia> HO = HarmonicOscillator(k=1.0, m=1.0, ℏ=1.0)
HarmonicOscillator
  k: Float64 1.0
  m: Float64 1.0
  ℏ: Float64 1.0

In any case, this struct contains information about the variable names and their values.