adds a system for processing strings found in annotations before they're used by AnnotationParser
implements #347
Also, because we're using "-Werror", the code won't actually build (and thus tests won't work) using JDK18. To remedy this, a bunch of @SuppressWarnings("serial")s has been added to the exceptions. We don't serialize exceptions, and they're in fact non-serializable because of their members, so this is the appropriate solution (well, the better solution would be to make them serializable, but that's outside the scope of this PR).
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