Config option to replace `log4j2.xml`

[sylv256]

Nobody else seems to want this feature, but it would be immensely useful for niche cases considering NeoGradle has this feature out-of-the-box. Personally, I prefer Fabric's logging to NeoForge's, so not having to replace the file every time I reload my gradle project would improve my quality of life.

[neoforged-releases]

🚀 This issue has been resolved in ModDevGradle version 2.0.82, as part of #247.