code impl of FieldNameConstants rewrite + test updates for it

test/transform/resource/before/FieldNameConstantsEnum.java

@@ -0,0 +1,13 @@
+import lombok.experimental.FieldNameConstants;
+import lombok.AccessLevel;
+
+@FieldNameConstants(onlyExplicitlyIncluded = true, asEnum = true, innerTypeName = "TypeTest")
+public class FieldNameConstantsEnum {
+	@FieldNameConstants.Include
+	String iAmADvdPlayer;
+	@FieldNameConstants.Include
+	int $dontSkipMe;
+	@FieldNameConstants.Include
+	static double alsoDontSkipMe;
+	int butSkipMe;
+}