Issue 2 create navbar component

[saltyypringle]

Change Summary

• Created a navbar with responsive design and mobile dropdown menu.
• Navbar uses the required font, colours, and styling.
• Colour of the navbar pages changes on hover.
• Clicking on the logo routes back to the home page.

Change Form

• The pull request title has an issue number
• The change works by "Smoke testing" or quick testing
• The change has tests - not sure what tests to write for a navbar
• The change has documentation - not sure if anything is needed to document

Other Information

N/A

Related issue

• Resolve Create navbar component #2

[SafetyInObscurity]

A good start, but there's still some polish to go.