WIP: ES6 module conversion and webpack refactoring

- Convert all IIFE modules to ES6 modules with attach functions
- Split webpack configs: lib build vs demo build
- Add UMD wrapper for auto-initialization with jQuery
- Update package.json with sequential build scripts
- Clean up legacy dist files and reorganize demo structure

Status: jQuery timing issues remain - attach functions not accessible
Next: Debug UMD factory execution and jQuery parameter passing

demo/index.html

@@ -7,7 +7,7 @@
         <link rel="stylesheet" href="./dist/bootstrap5-editable/css/bootstrap-editable.css">
 <!--        <script src="./dist/bootstrap5-editable/js/bootstrap-editable.js"></script>-->
 <!--        <script src="./dist/jquery.js"></script>-->
-        <script src="./dist/app.js" type="module"></script>
+        <script src="./demo/dist/app.js" type="module"></script>
 
         <title>Bootstrap 5.3.3 Test</title>
     </head>