[fix Parser.py] fixed up the class Parser can not parser subckt by a mistake,#361

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WindDevil wants to merge 4 commits intoPySpice-org:masterfrom

WindDevil:fix_up

Commits on Dec 7, 2023

fixed up the class Parser can not parser subckt by a mistake,that mistakely use isinstance to compare 'SubCircuitStatement' and 'SubCircuit'
WindDevil
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Commits on Dec 11, 2023

let parser support 'inc' and 'include'
WindDevil
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Commits on Dec 15, 2023

fix up if include a reletive path,set work dictionary
WindDevil
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Commits on Dec 16, 2023

There is another problem that ngspice not only print
WindDevil
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