Quote all text and data params

[patrick-austin]

E.g.

muon-galaxy-tools/muspinsim_plot/muspinsim_plot.xml

Line 35 in bd56324

python ${__tool_directory__}/generate_plot.py inputs.json

While doing this, should also ensure that places where we quote use single rather than double quotes:

muon-galaxy-tools/pm_dftb_opt/pm_dftb_opt.xml

Line 31 in bd56324

unzip "$muonated_structures" &&