D refactor/advertisement upload/huishi yining

[YiningSP]

Description

• Refactor and fix bugs in admin upload page
• Added limitations to the image being uploaded
• Added company's link fill in box
• Added admin upload cypress testing

Types of Changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] Issue fix (non-breaking change that addresses existing opened issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [x] Refactoring change (refactoring change must not apply any form of functional change)

Fixes

N/A

Notion Task Coverage

D-fix/advertisement-upload/huishi-yining D-refactor/advertisement-upload/huishi-yining

Checklist

• [x] Related issues linked using fixes #number. / There is no issue fix.
• [x] Unit tests or E2E tests added for any new feature changes. / There is no new feature that requires test.
• [x] Ensured that there's no linter errors.
• [x] Ran the full set of testings and coverage reports exceed 80%. / There is currently no test.
• [x] All Merge Conflicts have been fully resolved.
• [x] Branch is rebased off the target branch.
• [x] This PR is complete and does not have incomplete work that'll break the application.

[tohmenchoo]

LGTM