Co-authored-by: MD <1917406+md678685@users.noreply.github.com>
This PR makes HelpInput use knownCommands in the command map, rather than relying on plugin descriptions. This means that commands that have been registered programmatically (or impromptu) will be recognized and displayed in the help menu.
The ugly reflection is due to Spigot not exposing the command map getter. This has been tested on Spigot 1.8, 1.16.3 and Paper 1.16.3 with plugins that register commands directly to the command map.