[Doc][Flight] Mention Flight SQL in implementation status #31765
Description
It seems Flight SQL should probably be present in a way in the implementation status page:
https://arrow.apache.org/docs/dev/status.html#flight-rpc
Reporter: Antoine Pitrou / @pitrou
Assignee: David Li / @lidavidm
Related issues:
- [Doc] Add Flight SQL to implementation status page (supercedes)
PRs and other links:
Note: This issue was originally created as ARROW-16384. Please see the migration documentation for further details.