[PAGE LAYOUT] - Define basic layout

[danielyoshizawa]

Description :

• Define a basic layout for the sections, code challenges, articles, and projects.
• We need an expandable model, allowing us to easily add more items.

Goals:

• Have a basic layout to accommodate specific pages.

[danielyoshizawa]

This issue took me to start investigating the use of react instead of handlebars. I'll hold this one for now