Add tests for script configuration machinery, namely ScriptTemplateProvider EP

Test highlighting and navigation depending on provided script definition

idea/testData/script/definition/navigation/javaLibWithSources/lib/test/Utils.java

@@ -0,0 +1,7 @@
+package test;
+
+public class Utils {
+    public static void foo(String str) {
+
+    }
+}