Haoyue faq tool implementation

[oliviahyw]

Description

Related PRS (if any):

To test this backend PR you need to checkout the #3118 frontend PR.

Main changes explained:

• Implemented FAQ search and auto-suggest function
• Implemented FAQ management for admin and owners to see all FAQs
• Implemented FAQ history for change history
• Implemented log unanswered question and email owner function
• Added permission management for "manage FAQs"

How to test:

1. check into current branch
2. do npm install and ... to run this PR locally
3. Clear site data/cache
4. log as admin user
5. go to http://localhost:3000/faq to test FAQ search, auto-suggest, and log unanswered FAQ function
6. go to http://localhost:3000/faq-management to test view, update, delete FAQ function; add new FAQ function; view FAQ change history function
7. go to http://localhost:3000/unanswered-faqs to test view all unanswered questions function; and mark as logged (deleted unanswered question) function

Screenshots or videos of changes:

faq.mov

faq-management.mov

permission-management.mov

unanswered.mov

Note:

Include the information the reviewers need to know.