RFC: Filter out classes already taken

[vicksey]

Summary

Uses data from PeterPortal to filter out classes that users have taken before the current quarter in their four-year plan.
This feature is implemented with OAuth to pull users' data.

Test Plan

• Log into a users' account and
• Toggle on/off the filter feature (UI)
• Search for a course the user's already taken in the past (their four-year plan) and it shouldn't show up in both the fuzzy search and search list if toggled on
• Shouldn't filter if toggled off
• Make sure search is still good

Issues

Closes #1028

To Do:

• Waiting for PeterPortal endpoint
• Implement backend filter logic
• UI component for toggling feature on/off
• Fetch userId's from auth

[Awesome-E]

PR on PeterPortal side is up so you can test.
icssc/peterportal-client#598