Purge accepts unsupported arguments and deletes more than requested

[takatalvi]

Hi, I would like to express my annoyance about the current purge behavior on v23.4 and also provide a possible solution.

I understand that /co purge supports a limited range of arguments and while that alone might be another feature request, my issue is that at the moment, unsupported arguments are accepted by the command anyway, which can have drastic effects.

Example: the user: argument is not supported, so when I unknowingly try to run someting like /co purge t:30d u:#water to only purge water block changes, I am surprised to see that I basically ran /co purge t:30d, which is something quite different and often irreversible.

Solution: Please improve the warnings on the /co purge command to warn the user when an argument is not supported, instead of running the command as if it was entered without the argument.

Thank you.