Fix broken links to deprecated Wiki

[skullbunnygalaxy]

A number of links, both in the GitHub markdown and the website, are broken due to linking to the old wiki.

Examples
Page: https://www.growstuff.org/about
Broken Link: For more information about Growstuff, <a href=" http://wiki.growstuff.org/index.php/About%20Growstuff">our wiki page</a>

Page: https://github.com/Growstuff/growstuff/blob/dev/README.md#for-coders
Broken Link: We encourage [pair programming](http://wiki.growstuff.org/index.php/Pairing), especially for newer developers.

Recommend searching code bases for all old wiki links and replacing either with relevant wayback machine links or updated links to github wiki.

[CloCkWeRX]

Also> For detailed crop wrangling guidelines, please consult the crop wrangling guide on the Growstuff wiki

[CloCkWeRX]

Something annoying with the CMS and saving pages, will have to dig into the error logs.

[CloCkWeRX]

2023-03-13T01:45:59.557373+00:00 app[web.1]: [9aad28f6-90d9-41a0-910e-10b7badd924b]
2023-03-13T01:45:59.557387+00:00 app[web.1]: [9aad28f6-90d9-41a0-910e-10b7badd924b] ActiveRecord::StatementInvalid (PG::UndefinedTable: ERROR:  relation "active_storage_attachments" does not exist
2023-03-13T01:45:59.557388+00:00 app[web.1]: LINE 8:  WHERE a.attrelid = '"active_storage_attachments"'::regclass