Interpret kinetic data from yaml directly and bypass .npz

[jiweiqi]

Arrhenius.jl/src/Solution.jl

Line 56 in 51a2f3d

product_stoich_coeffs = sparse(npz["product_stoich_coeffs"])

Basically, following the code in ReacTorch. So far, it works well, and this task is not urgent at all.