Cross-project configuration resolution

[jpenilla]

Starting with Gradle 7.1.1, resolving configurations of another project in a task is now deprecated for removal in Gradle 8 (see https://docs.gradle.org/7.1.1/userguide/viewing_debugging_dependencies.html#sub:resolving-unsafe-configuration-resolution-errors).

This warning is currently triggered for reobfJar in core and patcher.

These are some possible solutions, in no particular order:

1. Resolve the remapper configuration during configuration time and provide the list of resolved files to RemapJar
2. Add a remapper configuration to the server project as well
3. Move reobfJar to the parent project instead of the server project