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/shared-utils/getCardPath.tsx

@@ -24,7 +24,7 @@ export const getCardPath = (
   } else {
     if (sectionName) {
       return card.numberOfFiles > 1
-        ? `${basePath}/section/${sectionName}/${card.fileName}`
+        ? `${basePath}section/${sectionName}/${card.fileName}`
         : `${basePath}${card.fileName}`;
     } else {
       return card.numberOfFiles > 1 && !isSection