Added test cases for intersection

javascript/extractor/tests/es2024/input/intersection.js

@@ -0,0 +1,7 @@
+/[[abc]&&[bcd]]/v; // Valid use of intersection operator, matches b or c
+/abc&&bcd/v; //Valid regex, but no intersection operation: Matches the literal string "abc&&bcd"
+/[abc]&&[bcd]/v; // Valid regex, but incorrect intersection operation: 
+                 // - Matches a single character from [abc]
+                 // - Then the literal "&&"
+                 // - Then a single character from [bcd]
+/[[abc]&&[bcd]&&[c]]/v; // Valid use of intersection operator, matches c