Exceptions report more information

[Daniel-Ibarrola]

When a MolSysMT exception is raised it reports the name of the method or function that raised it. Example:

import molsysmt as msm
msm.get(element="cow")

Traceback (most recent call last):
  ...

molsysmt._private.exceptions.value_errors.WrongElementError: Error in get. Wrong element name: cow. Check  for more information. If you still need help, open a new issue in https://github.com/uibcdf/MolSysMT/issues.

Exceptions make use of the inspect library to retrieve the name of the function that raised them. However, many of the functions check their arguments with a decorator and the name of the function is lost and cannot be retrieved with the inpsect library. To fix this, an optional argument "caller" was added to the exceptions as well as the digestion functions.

Also, NotImplementedConversionError was implemented as before.

Closes #61

[dprada]

Thanks! It is a pity that an extra 'caller' argument had to be added, but what matters is that you made it work.

I don't resign myself to thinking that this 'caller' argument could be avoided. Really inspect is not useful with the decorator? Let me open an issue to give me the chance in the future to think about it, even if you think that there is no other way to solve it 😜.