Add integration tests for ThOr documentation

Related to this comment, the translation LoKi-ThOr table is not tested, and maybe also other components of the ThOr documentation are not properly tested.

Could be nice to have some general tests to check the reliability of related MRs.

As follows, a list of possible tests to implement while working on the ThOr documentation (feel free to add items to the list and modify it):

• Test on .csv format for LoKi-ThOr conversion table (f.e. they should have 4 columns)
• Doctests
• Docstring format

cc: @sponce, @mvesteri, @poluekt