v1.0.2: Status query & 1.17 / 1.16 support

Use itick status to query the current status (whether items are frozen or not).

Backported to 1.17.
(April 19) Backported to 1.16. (REQUIRES JAVA 17)

v1.0.1 - Item pickup disabled.

Still 1.18.1 only. Shouldn't be too hard to backport.

v.1.0.0: `itick freeze`

Adds itick freeze command which prevents item entities from ticking, while still letting them be rendered nicely.