[WEB-1119] style: editor typography, borders and alignment throughout the platform (#4322)

* chore: new font sizes

* chore: update space app editor border

* chore: issue detials page x-padding

* chore: editor width

space/components/editor/rich-text-read-only-editor.tsx

@@ -18,7 +18,7 @@ export const RichTextReadOnlyEditor = React.forwardRef<EditorReadOnlyRefApi, Ric
         mentionHandler={{ highlights: mentionHighlights }}
         {...props}
         // overriding the customClassName to add relative class passed
-        containerClassName={cn(props.containerClassName, "relative border border-custom-border-200 p-3")}
+        containerClassName={cn("relative p-0 border-none", props.containerClassName)}
       />
     );
   }