[MISC] Add Navbar

[IcedTea2K]

Description

We want to have two different versions of the NavBar:

• Normal Page - this requires overwriting the original Navbar. Follow the design on Figma.
• Documentation Page - this will be very similar to the Starlight's Navbar. Follow the design on Figma.

Exit criteria

• Navbar should be responsive on mobile view
• Navbar is following the design on Figma
• No hard-coded links on the Navbar. The custom navbar must take in and display appropriate props.

Additionals/Bonus points (these are nice to have, but they're not essential for this issue)
N/A

Additional Context/References

For guides/reference on how to overwriting the navbar:

• General guide: https://starlight.astro.build/guides/overriding-components/
• Header/Navbar reference: https://starlight.astro.build/reference/overrides/#header

In both guides, they mention the props. Make sure to use appropriate props to display the tabs, instead of hard-coding them.