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

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

packages/twenty-website/src/content/user-guide/other/github.mdx

@@ -54,4 +54,4 @@ If you have any question, for example on how to contribute, join the community o
 <br/>
 Thank you for contributing to Twenty ❤️
 
-<ArticleEditContent articleTitle="github.mdx"></ArticleEditContent>
+<ArticleEditContent></ArticleEditContent>

packages/twenty-website/src/content/user-guide/other/glossary.mdx

@@ -43,4 +43,4 @@ Integration are built-in tools that allow to link Twenty with other software or
 ## User Profile
 A User Profile is the information and settings specific to a workspace member in Twenty.
 
-<ArticleEditContent articleTitle="glossary.mdx"></ArticleEditContent>
+<ArticleEditContent></ArticleEditContent>

packages/twenty-website/src/content/user-guide/other/tips.mdx

@@ -89,4 +89,4 @@ You can add records to your favorites for quick access. To do so, expand the rec
 
 <img src="/images/user-guide/tips/favorites.png" style={{width:'100%', maxWidth:'800px'}}/>
 
-<ArticleEditContent articleTitle="tips.mdx"></ArticleEditContent>
+<ArticleEditContent></ArticleEditContent>