Add "course" and "professors" endpoint to section endpoint

[jpahm]

Currently, it can be inconvenient and overcomplicated for our end users to perform some common aggregate operations such as getting a section's course or the professors which teach the section.

As such, we should add the following endpoints which immediately aggregate and return matching sections' courses or professors:

Courses:

• Query based: GET /section/course (allows for querying like the base section endpoint)
• ID specific: GET /section/{sectionId}/course (gets course only for a specific section)

Professors:

• Query based: GET /section/professors (allows for querying like the base section endpoint)
• ID specific: GET /section/{sectionId}/professors (gets professors only for a specific section)

[KD-kAnEsHi]

I would like to do this

[jpahm]

I would like to do this

You are welcome to do so! I would heavily suggest looking at what @mikehquan19 did in #234 for some inspiration or guidance.

[KD-kAnEsHi]

understood, I will keep you updated