feat: search api integration with postgres fulltext search

closes #140

Context

previously, there was effort made to introduce search UI at #152. this PR completes that line of work by introducing full searching and filtering search results functionality

Changes

abstract subcomponents of <SearchResult/>
update <SearchResultContent/> to encapsulate search filtering logic
update <searchResult.Title/> component to be server-sided
expose radix-ui toggle group's onValueChange prop at <SearchResult.Filter/>
add search function searchProf and searchCourse at @/common/functions/*

Implementation Details

using postgres's full text search
make query using prisma's $queryRaw api

[!IMPORTANT] note that the quick and dirty sql query used is meant to be temporary, until we can find a sensible search solution with #72

Filter

radix-ui toggle group with exposed hook to update filter state
conditional rendering based on filter state
ranking: course is always ranked above professor

[!WARNING] the review count & course/professor count statistics icon is currently using hard coded values (11 & 31) this will be addressed as a separate task at #162

How to Test

head to preview link
click / to open search bar
search anything, search "L" for example
should see results a. if no results, should see a message "no results found"
filtering should work

Preview / Screenshots

screenshot_20240612_112047

Checklist

[x] I have read the CONTRIBUTING document
[x] I have tested the changes
[x] (where applicable) I have added tests to cover my changes
[x] (where applicable) I have updated the documentation accordingly

AfterClass-io / afterclass.io-v2

feat: search api integration with postgres fulltext search #161