[Resources] Add CS course resources

[dannychen27]

Students tend to ask for course resources like concept visualizations (e.g., Git visualizer) or YouTube channels (e.g., Ben Eater, 3blue1brown, Easy Theory, etc.), but it'd be convenient to have it all in one place on the CSSU website.

Consider adding a list of academic resources webpage to the CSSU website. (e.g., for csc108, a link to the CSC108H1 youtube channel)

We don't have to add all of the course resources for every course all at once. We can add to this list gradually by committing to a separate GitHub branch, and merging some of those commits to main periodically.

first year courses: CSC108H1, CSC148H1, CSC165H1, CSC110Y1, CSC111H1
second year courses: CSC207H1, CSC209H1, CSC236H1, CSC263H1, CSC258H1
third year courses: CSC309H1, CSC311H1, CSC324H1, CSC369H1, CSC373H1 + more!
fourth year courses: upon request.

[dannychen27]

This way, students don't have to re-discover useful academic resources -- i find myself losing this personal list a lot, and i've love to just have one place for it (other than my bookmarks)!