ChaosMerge universal mod format

This JAR contains one Fabric-ready class view and one standard, directly
inspectable nested JAR per non-Fabric loader (NeoForge and/or Forge) under
META-INF/chaosmerge/. Each nested JAR contains ordinary .class and service
entries. It is not encrypted, obfuscated or a custom executable payload.

On NeoForge and Forge a small mod-local bridge loads the nested singleton
bootstrap and uses ModLauncher plus the official mod-file locator SPI to
build deterministic local cache JARs for all compatible universal mods.
It performs no network access, process execution, native code loading,
persistence outside the game cache, or code download.