[feature] Improved error handling

[vogt31337]

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Problem Description

In pandapower when a bug happens we normally get a stacktrace. But most often they are are hard to understand and are hard debug.

Feature Description

Maybe we can improve the situation and throw "better" error messages allowing for easier debugging, for example if an operation on a pandas table fails, return where and which table the error happened on.

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[pawellytaev]

I agree! Also in case there is an issue with any element in the grid that causes an error, pandapower should point to the element (e.g. error in ppc[branch] can be a trafo, trafo3w, line, impedance etc.).

Also, how about extending/updating the pp.diagnostic()? Might be reasonable to update it with possible issues from new elements that came into pandapower (belongs in a separate issue)