appendApiDepJars

Probe each type listed in the bundle's deps.txt on the game loader and add its backing jar to cp, recovering the MC API-dep jars (e.g. mojang serialization) the production bundler hides from enumeration. A missing or unreadable deps.txt is non-fatal (logged) — a partial cache, or simply a hand-supplied bundle, which is not required to carry one; client-only names just don't resolve.