docs: add package-info.java for nanopublication test suite documentation

Author: ashleycaselli

src/main/java/org/nanopub/testsuite/package-info.java

@@ -0,0 +1,5 @@
+/**
+ * This package contains the code for the nanopublication test suite, which is a set of nanopublications that are used to test the functionality of nanopublication tools and libraries.
+ * The test suite includes nanopublications that cover a wide range of scenarios, including valid, invalid, signed, unsigned and more nanopublications.
+ */
+package org.nanopub.testsuite;