add postman test collection to fetch sfu courses data

[jerrydngzh]

How to install Postman:

• Go to: https://www.postman.com/downloads/. Get the windows client or use the web client
• If you use the web client, I've made a postman account via the google account (see announcements) https://web.postman.co/workspace/My-Workspace~a81219c0-1cfb-4098-84e8-4c98f74bf221/overview
• otherwise sign in through the windows client the same way through google

What I did:

• setup simple postman test collection with request hitting all endpoints available on SFU courses API. (It's very minimal)

Discoveries:

1. Course antirequisites is returned in a "notes" section, meaning we need to do some parsing to get just the course name/number + all other general antirequisites
2. There will be missing fields returned when making a request for a course section. Will vary between courses requested
3. Courses data is organized like a folder: year/term/department/courseNumber/courseSection. Meaning, for example, to get all professors of a course's section you would need to call all specific course sections and fetch that data out of each response

How to test:

1. Import the postman test collection in the files or see instructions under "How to install Postman". The collection will be there already under the postman account I've setup
2. Send a request and inspect the data