Stable 1.16.5 Release

[John-Paul-R]

Currently, the MC 1.16.5 version of Essential Commands relies on GrossFabricHacks which relies on deprecated (and, in modern versions of Java, outright removed) reflection APIs.

There were reasons for this... but with the present state of the ecosystem, this is causing more trouble than its worth.

Whatever new version is published should be runnable on both Java 8 (which I believe 1.16.5 released with, and Java 21 (current LTS))

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Issues this will likely resolve:

• #271
• #293
• #193

[John-Paul-R]

First priority should be making the existing 1.16.5 code run. Worry about the possibility of backporting features later.