[feature request] allow loading of classes on failure

[Decencies]

When a class from a JAR file fails to parse, it should be possible to load the rest of the classes, disregarding any information which could not be successfully inferred by the erroneous class.

[Decencies]

In my case the fix was as simple as removing: https://github.com/QuiltMC/enigma/blob/ed5ae3c1b69326f67229195918a61f7b367b7732/enigma/src/main/java/org/quiltmc/enigma/impl/analysis/index/IndexReferenceVisitor.java#L62