Paginate course lookup function

[jidicula]

Description of Problem / Inefficiency:

The course lookup function can be extended to include pagination of previous offerings of the course from past years.

Implementation Suggestion:

Some pagination magic – will need to keep doing a lookback for past years. I'm unsure how far we should look back in the course calendar though.

Additional Context / Screenshots:

An important consideration is that the structure of course calendar entries in the past may differ from its current state, complicating the BS4 parsing.