Allow to create coo and footprint object

src/js/A.js

@@ -40,6 +40,8 @@ import { Coo } from "./libs/astro/coo.js";
 import { URLBuilder } from "./URLBuilder.js";
 import { HiPSDefinition } from "./HiPSDefinition.js";
 import { ColorCfg } from './ColorCfg.js';
+
+import { Footprint } from './Footprint.js';
 import { ObsCore } from "./vo/ObsCore.js";
 import { Aladin } from "./Aladin.js";
 // Wasm top level import
@@ -141,6 +143,16 @@ A.catalogHiPS = function (rootURL, options) {
     return new ProgressiveCat(rootURL, null, null, options);
 };
 
+// API
+A.coo = function (longitude, latitude, prec) {
+    return new Coo(longitude, latitude, prec);
+};
+
+// API
+A.footprint = function(shapes, source) {
+    return new Footprint(shapes, source);
+};
+
 // API
 A.footprintsFromSTCS = function (stcs, options) {
     var footprints = Overlay.parseSTCS(stcs, options);
@@ -171,7 +183,7 @@ A.catalogFromURL = function (url, options, successCallback, errorCallback, usePr
     const processVOTable = function (sources, footprints, fields) {
         catalog.setFields(fields);
 
-        if (catalog.isObsCore()) { 
+        if (catalog.isObsCore()) {
             // The fields corresponds to obscore ones
             // Set the name of the catalog to be ObsCore:<catalog name>
             catalog.name = "ObsCore:" + url;
@@ -305,4 +317,4 @@ A.init = (async () => {
     }
 })();
 
-export default A;
+export default A;