[Doc] add farith2 documentation

2 jobs for colibri in 3 minutes and 13 seconds (queued for 5 seconds)
Status Name Job ID Coverage
  Test
passed test #433692
docker

00:02:17

 
  Css
failed check-css #433693
docker allowed to fail

00:00:56

 
Name Stage Failure
failed
check-css Css
    ________________________________________________
|
| PurifyCSS - Rejected selectors:
| .icon-lock:before
|
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Cleaning up file based variables
ERROR: Job failed: exit code 1