Hi,

after getting an encouraging reply to my initial proposal[1], I went
forward and finished the patch to include the BBCode exporter in Org.
The patch applies to current master and includes a suite of tests.

Please review and/or apply this patch.

Best regards,
Christian

[1] https://lists.gnu.org/archive/html/emacs-orgmode/2021-01/msg00151.html
-- 
....Christian.Garbs....................................https://www.cgarbs.de

It seemed like a good idea at the time.