(activity): Activities List Page

[brrkrmn]

This issue presents the changes in Activities List ('/activities') page for the Activity Feature.

Design: https://www.figma.com/file/nyUduEpFmVZ05xA8rt28Mt/ZubHub-Feature-Re-Designs?type=design&node-id=304-424&mode=design&t=FsRULrVG2GYIKguh-0

Checklist:

• [x] All users should be able to see all published activities.
• [x] If the user (educator) has any unpublished activities, they should also be able to see them in the activities list page. indicating that they are unpublished and waiting for approval.
• [x] Staff Role users should see all published and unpublished activities in this page.