Cert certificates merge

[TheMOHD3886]

Description

Created overview- and empty page for content creator certificates, which have been tested through Cypress.

Changes

• Added certificate page file with layout and component to App.tsx
• Added CertificateList component for the list of certificates
• Added CertificateCard component for each item of the list
• Added Certificate to Navbar dropdown
• Added CERT_URL for certification microservice URL in environment
• Added Certificate interfaces
• Created certificate service file
• Added functions for retrieving certificate with ids pointing to course and user + retrieval of these
• Created component for certificate fields
• Moved loading to component/general
• Added cypress file for testing the page
• Added ids to some elements for testing
• Added test for empty certificate page
• Added test for non-empty certificate page
• Added necessary ids
• Installed cypress-localstorage-commands for easier login in tests
• Created empty page when the content creator has no certificates

Related Issues

None.

Checklist

• [x] Code has been tested locally and passes all relevant tests.
• [x] Documentation has been updated to reflect the changes, if applicable.
• [x] Code follows the established coding style and guidelines of the project.
• [x] All new and existing tests related to the changes have passed.
• [x] Any necessary dependencies or new packages have been properly documented.
• [x] Pull request title and description are clear and descriptive.
• [x] Reviewers have been assigned to the pull request.
• [x] Any potential security implications have been considered and addressed.
• [x] Performance impact of the changes has been evaluated, if relevant.

Screenshots (if applicable)

If mobile/frontend pull request, what version of the backend is it stable, and running on?

Branch: cert-get-user Commit id: b746a380ed42c345eb18f480cd12f5b5ea9f3b26

Notes for Reviewers

In order to see any certificates they have to be made through the certificate microservice, and this should also be up and running.