feat: Revamp website following UX work

[pnu-s]

Fixes #111 (see UI models)

The best to review is to deploy locally and check all pages

• Added new links on home page
• Added EP's logo on navbar
• Removed some links on navbar
• Improved responsibility of the "who" page
• Added github logo on footer
• Moved CoC to a separate page

TODO:

• [x] Update who page with new members
• [x] Create statutes page
• [x] Update contact to remove Twitter

[codeurimpulsif]

According to our decision to don't use the Twitter account anymore, I think we can use this PR to remove links to it?

[pnu-s]

According to our decision to don't use the Twitter account anymore, I think we can use this PR to remove links to it?

Sure, I'll add this to the TODO in this PR's description