default TraceThread createThread(String path, String display, long creationSnap)
			throws DuplicateNameException {
		return addThread(path, display, Lifespan.nowOn(creationSnap));
	}
Add a thread with the given creation snap

@see #addThread(String, String, Lifespan)
Ghidra/Debug/Framework-TraceModeling/src/main/java/ghidra/trace/model/thread/TraceThreadManager.java