Implement header component

[arkid15r]

The component should be responsible for rendering the Nest navbar:

The currently used code is located here

Nest/backend/templates/base.html

Line 33 in 31be56e

<nav class="navbar navbar-expand-lg sticky-top border-bottom border-body mb-4"

For simplicity we can focus on just replicating the current look with TypeScript/React for now.

[kasya]

I'm taking this one! 💯

[arkid15r]

Thank you @kasya