Connect AttendanceTracker Component to backend to make it functional

[ElaineShu0312]

Fetch and Display Meeting Dates

• implement an "add meeting" button that adds a new row to the attendance tracker
• the date field should be an editable text component (similar to the profile page)
• implement a "save" button that will save member attendance data to the backend

Fetch and Display Member Names

• Above each column of dropdowns, display member names.

Implement a Save button to store attendance data in backend

• make POST request to save dates, members, and their attendance status

Check if the user has the role of Project Lead in order to access the attendance tracker in the first place

[aidansunbury]

This depends on #31