[Docs] Link to cookbook from main docs site

[asfimport]

Now that the cookbook is hosted at https://arrow.apache.org/cookbook/ it can be linked to from the main docs

Reporter: Nicola Crane / @thisisnic

_{Note: This issue was originally created as ARROW-13667. Please see the migration documentation for further details.}

[asfimport]

Alessandro Molina / @amol-:
Being tackled in #10999 as part of another issue