Feature: Develop the landing page navbar

[bridgitkanini]

Description

Develop the landing page navigation bar as per the Figma designs. Include sign up and login pages.

Tasks

• Develop the navigation as per the Figma designs
• Make sure the components are fully responsive
• Write Unit and e2e tests in the tests folder, to test the components' look, feel, and functionality
• Include a list of any API endpoints required in the pull request description, if applicable

Tools to use for tests:

• Vitest for Unit tests
• Playwright for e2e tests