fix: ensure to remove file ext .js only from module path (#127)

packages/plugin/__test__/__snapshots__/test.js.snap

@@ -1418,7 +1418,7 @@ exports[`imports import-multiple.js 1`] = `
 `;
 
 exports[`imports import-remove-fileext.js 1`] = `
-"sap.ui.define(["array-flatten/dist/index"], function (__array_flatten_dist_indexjs) {
+"sap.ui.define(["@dummy/chart.js", "chart.js", "array-flatten/dist/index"], function (___dummy_chartjs, __chartjs, __array_flatten_dist_indexjs) {
   "use strict";
 });"
 `;

packages/plugin/__test__/fixtures/imports/import-remove-fileext.js

@@ -1 +1,3 @@
+import "@dummy/chart.js";
+import "chart.js";
 import "array-flatten/dist/index.js";

packages/plugin/src/modules/visitor.js

@@ -32,11 +32,11 @@ const hasGlobalExportFlag = (node) => hasJsdocGlobalExportFlag(node);
 const addImport = (imports, imp, filename, first) => {
   const existingImport = imports.find((i) => i.src === imp.src);
   if (!existingImport) {
-    // if a module ends with the file extension ".js" and it can be resolved to
+    // if a module path ends with the file extension ".js" and it can be resolved to
     // a local file having also the file extension ".js" and not ".js.js" then
     // we need to slice the file extension to avoid redundant file extension
     // (the require/define of UI5 always adds the file extension ".js" to the module name)
-    if (imp.src.indexOf(".js") != -1) {
+    if (/^(?:(@[^/]+)\/)?([^/]+)\/(.*)\.js$/.test(imp.src)) {
       try {
         const modulePath = require.resolve(imp.src);
         if (modulePath.endsWith(imp.src.split("/").pop())) {