feat: allow sorting of articles (#6833)

* feat: sort by position

* chore: whitespace change

* feat: add border bottom color to list item

* feat: allow dragging articles

* feat: add migration to reorder all articles

* feat: add onsort method

* feat: finish UI sorting

* feat: show 50 per page in articles list

* feat: add article sorting methods

* feat: patch up reorder action with the API

* refactor: better naming

* chore: add comments

* feat: attach position to article before create

* feat: move article to end if moved between categories

* chore: add comments

* chore: update version

* fix: don't change position if previous category was nil

* fix: condition to trigger update on category change

* refactor: store new_position

* refactor: use grid instead of table

* feat: add snug spacing

* feat: add grab-icon

* feat: add grab icon to list

* refactor: show draggable only for category page

* feat: add update_positions as a class method

---------

Co-authored-by: Nithin David Thomas <1277421+nithindavid@users.noreply.github.com>

app/javascript/shared/assets/stylesheets/spacing.scss

@@ -6,6 +6,7 @@
   --space-small: 0.8rem;
   --space-one: 1rem;
   --space-slab: 1.2rem;
+  --space-snug: 1.4rem;
   --space-normal: 1.6rem;
   --space-two: 2rem;
   --space-medium: 2.4rem;
@@ -21,6 +22,7 @@
   --space-minus-small: -0.8rem;
   --space-minus-one: -1rem;
   --space-minus-slab: -1.2rem;
+  --space-minus-snug: -1.4rem;
   --space-minus-normal: -1.6rem;
   --space-minus-two: -2rem;
   --space-minus-medium: -2.4rem;