Fixes bugs with copy entities from Position A to Position B

[TheMeinerLP]

Overview

Fixes #2140 Fixes #2427

Description

This PR included the fix for passenger of entities and also leashs for other entities. That means now //copy -e and //paste -e will work to 99% correct now for entities except some edge cases.

Submitter Checklist

• [X] Make sure you are opening from a topic branch (/feature/fix/docs/ branch (right side)) and not your main branch.
• [X] Ensure that the pull request title represents the desired changelog entry.
• [X] New public fields and methods are annotated with @since TODO.
• [X] I read and followed the contribution guidelines.

[TheMeinerLP]

I tested each of them on a Plot world

[LedariaTim1]

i just compiled your bugfix and tested it, the entities including passanger are now copied, but they are now both independent entities and no longer mounted. in my case the pig is no longer sitting on the invisible armorstand and can be moved around

[TheMeinerLP]

Bump! Tested with 1.20.1

[seercle]

Hey, do we have any news about this? This fix would be very useful for builders who use Block Display Studio to create structures.

[github-actions[bot]]

Please take a moment and address the merge conflicts of your pull request. Thanks!