Add JS source map parser and remapper

JS source map remapper takes parsed source maps
together with JS AST with correct JS positioning information
and converts the latter into Kotlin positioning information

.idea/libraries/json_org.xml

@@ -0,0 +1,9 @@
+<component name="libraryTable">
+  <library name="json-org">
+    <CLASSES>
+      <root url="jar://$PROJECT_DIR$/dependencies/json-org.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES />
+  </library>
+</component>