feat: add test on `/landing` to test Github url and Next middleware rerouting feature

[DepartureLV]

Description

add Cypress test for /landing page to test if the href is working as it should. add Cypress test for /landing page to test if mobile and desktop user get rerouted to the right path

Card Link

https://3.basecamp.com/5802516/buckets/37608217/card_tables/cards/7511542655

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [x] E2E Cypress test

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [x] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules

[dominiksakic]

@DepartureLV the test look good to me. I saw that you added two more dependencies - are these only used for the test? Could we install them as dev dependencies?

[DepartureLV]

@dominiksakic yes, I have moved that into dev dependencies. Can we merge this into development?