chore(dashboard): text changes and fixes (#7925)

- Improvements to existing texts
- Add subtitles to sections where useful.
- Added the ability to edit the message shown in a list when no records are found + change the message where necessary
- Change documentation link to `https://docs.medusajs.com/v2`.

packages/admin-next/dashboard/src/components/common/empty-table-content/empty-table-content.tsx

@@ -3,7 +3,7 @@ import { Button, Text, clx } from "@medusajs/ui"
 import { useTranslation } from "react-i18next"
 import { Link } from "react-router-dom"
 
-type NoResultsProps = {
+export type NoResultsProps = {
   title?: string
   message?: string
   className?: string