Docs modifications (#5804)

- Fixes #5504
- Fixes #5503
- Return 404 when the page does not exist
- Modified the footer in order to align it properly
- Removed "noticed something to change" in each table of content
- Fixed the URLs of the edit module 
- Added the edit module to Developers
- Fixed header style on the REST API page.
- Edited the README to point to Developers
- Fixed selected state when clicking on sidebar elements

---------

Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

packages/twenty-website/src/app/_components/contributors/ProfileCard.tsx

@@ -2,7 +2,6 @@
 
 import styled from '@emotion/styled';
 import { format } from 'date-fns';
-import Image from 'next/image';
 
 import { GithubIcon } from '@/app/_components/ui/icons/SvgIcons';
 
@@ -90,7 +89,7 @@ export const ProfileCard = ({
   return (
     <ProfileContainer>
       <Avatar>
-        <Image src={avatarUrl} alt={username} width={100} height={100} />
+        <img src={avatarUrl} alt={username} width={100} height={100} />
       </Avatar>
       <Details>
         <h3 className="username">