Add tests for script configuration machinery, namely ScriptTemplateProvider EP

Test highlighting and navigation depending on provided script definition

idea/testData/script/definition/highlighting/simple/script.kts

@@ -0,0 +1,7 @@
+val c = 3
+
+val g = listOf("a", "b", "c")
+
+val time = <error>measureNanoTime</error> {
+    println("text")
+}