API for adding Entity-renaming DataFixes

[xanderstuff]

I noticed SimpleFixes doesn't have a method for renaming Entities like it does for Items, Blocks, and Biomes. This PR adds that.

[xanderstuff]

Note:

1. This is based off of 1.18.2 Minecraft and pasted into GitHub's web editor because I currently don't have enough space on my PC to setup another project in my IDE. So I wouldn't be surprised if I made 1-2 mistakes.
2. This has not been tested

[xanderstuff]

I think these Labels apply:

• Library: misc
• s: waiting for test
• t: new api

[xanderstuff]

hmm, should a test for this be added to testmodV3 as well?

[xanderstuff]

AH! I forgot an import... like I said, I'm working with the webeditor here

[xanderstuff]

just a heads up: I'm currently swamped with work for at least a month. So if testing this is a blocking task, then I won't have time to do it for a while

[xanderstuff]

While we do wanna kill the DFU API later, it doesn't hurt too much to add a few things until it's replacement comes

is there any existing discussion on this planned replacement I can follow? is it being tracked in a GH issue and/or on the discord server?

[EnnuiL]

While we do wanna kill the DFU API later, it doesn't hurt too much to add a few things until it's replacement comes

is there any existing discussion on this planned replacement I can follow? is it being tracked in a GH issue and/or on the discord server?

Leo has discussed some potential ideas for the replacement on the toolchain server's #forum-qsl forum channel

[EnnuiL]

Anyway, I'm fast-tracking this PR's FCP to Monday, December 5th

[xanderstuff]

I'd advise against initiating FCP, because it's currently untested and I'd hate to be the author of potentially non-functional code in QSL. I really don't know if it works, I just know it compiles. Doesn't the tag s: waiting for test mean we should wait until it's tested?

[xanderstuff]

I'm not sure how lenient we are for betas to potentially have bugs, and I suppose that may be a part of an efficient development cycle, but I feel anything involving the DFU needs to have extra care taken because one of the consequences of any bugs/mistakes here includes world corruption (specifically, messing up all entities in the world)

[EnnuiL]

After some thinking and considering the IRL circumstances, I'm delaying the merging of this PR until I'm able to test it myself; After all, it isn't really as urgent as other merge-before-1.19.3 PRs since DFU API is disabled on 1.19.3