feat: Create a Pypsa parser

[pesap]

Is your feature request related to a problem? Please describe.

Having a pypsa parser such will allow us to do model comparison. It will also allow to export to either PCM and compare with ReEDS.

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[gincrement]

Dear all, dear @pesap and @ktehranchi, is there any progress on this one? Is there a possibility to help? KR, Markus

[ktehranchi]

Hi @gincrement - I haven't started on this, and have it on my research plan for the June time-frame. If you would like to get started on it earlier and collaborate I can help provide some insight on implementation. I'm happy to find a time to chat.

[pesap]

Dear all, dear @pesap and @ktehranchi, is there any progress on this one? Is there a possibility to help? KR, Markus

All help is welcomed! @ktehranchi is leading that effort. Happy to help coordinate efforts.