[OUDS] Update header and footer #3736

Prerequisites

• I have searched for duplicate or closed issues
• I have validated any HTML to avoid common problems
• I have read the contributing guidelines

Describe the issue

The light header and footer aren't accessible in terms of color
The background isn't well applied and some variables are only defined in bootstrap compat
The burger menu haven't the good variables applied as well

Reduced test cases

Try header outside of the documentation

What operating system(s) are you seeing the problem on?

Windows

What browser(s) are you seeing the problem on?

Firefox

What version of OUDS Web are you using?

1.4.0