Navigation Panel UI Sizing Changes (#5964)

## Fixes #5902 :
- [x] Navigation items' height should be risen to 28px.
> For clarity:
- [x] Also increased the height of NavigationDrawerSectionTitle to 28px
to match navigation item.
- [x] The gap between sections should be reduced to 12px
> Was already completed it seems.
- [x] The workspace switcher should be aligned with the navigation items

---------

Co-authored-by: Lucas Bordeau <bordeau.lucas@gmail.com>

packages/twenty-front/src/modules/ui/navigation/navigation-drawer/components/NavigationDrawer.tsx

@@ -53,7 +53,7 @@ const StyledContainer = styled.div<{ isSubMenu?: boolean }>`
 const StyledItemsContainer = styled.div`
   display: flex;
   flex-direction: column;
-  gap: ${({ theme }) => theme.spacing(8)};
+  gap: ${({ theme }) => theme.spacing(3)};
   margin-bottom: auto;
   overflow-y: auto;
 `;