Add String contains() method

Author: bentsherman

src/main/java/nextflow/script/types/shim/String.java

@@ -28,6 +28,11 @@
 @Ops(StringOps.class)
 public interface String {
 
+    @Description("""
+        Returns `true` if the string ends with the given substring.
+    """)
+    boolean contains(String s);
+
     @Description("""
         Returns `true` if the string ends with the given suffix.
     """)