Perform search query execution on database

[AutumnQiu99]

Details:
-Query the specific section of the database responsible for keeping track of post titles
-Store the query results so they can be displayed later

Estimated effort: 5-8 hours

Initial assignments:
-Assigned to @AutumnQiu99

Milestone: sprint 2

Acceptance criteria:

• The system retrieves data from the relevant tables in the database based on user search queries.
• The system supports exact matches and case-insensitive searches at the very least, with the possibility of partial matches being supported.
• The system can handle special characters without errors.