Add review function to paper class

[ChristianGerloff]

We aim to add a new method termed review to the paper class. This function takes in a boolean value indicating if the paper was selected and an optional list of criteria used to review the paper. The function sets the reviewed attribute to True, sets the criteria attribute to the provided criteria, and sets the selected attribute to the provided boolean value. This will allow users to easily review papers and keep track of their selection status and criteria used. Further, we will need to adjust the RISclass

RIS

custom1: bool paper.selected
custom2: bool paper.reviewed
custom3: List[str] list(paper.criteria)
custom4: int paper.citations
custom5: List[str] list(paper.publication.subject_areas)
custom6: List[str] explains custom filds

[ChristianGerloff]

@kashyapm94 fyi, perhaps relevant for refactoring the branch (SYF)