refactor: Remove jQuery dependency and consolidate JavaScript assets

- Rename vendor JS file to activeadmin/quill_editor.js to avoid conflicts
- Update import alias to use 'activeadmin/quill_editor' for consistency
- Remove jQuery-dependent legacy file (quill_editor_input.js)
- Simplify engine asset configuration - only one JS file now
- Update documentation with correct paths and import names
- All functionality preserved with vanilla JavaScript

BREAKING CHANGE: Drops support for jQuery-based initialization.
Applications using the legacy jQuery initialization will need to
update to the new module-based approach.

🤖 Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>

spec/dummy/app/assets/builds/active_admin.js

@@ -2943,9 +2943,9 @@
     }
   });
 
-  // ../../vendor/assets/javascripts/activeadmin_quill_editor.js
-  var require_activeadmin_quill_editor = __commonJS({
-    "../../vendor/assets/javascripts/activeadmin_quill_editor.js"(exports2, module2) {
+  // ../../vendor/assets/javascripts/activeadmin/quill_editor.js
+  var require_quill_editor = __commonJS({
+    "../../vendor/assets/javascripts/activeadmin/quill_editor.js"(exports2, module2) {
       (function() {
         "use strict";
         const defaultTheme = "snow";
@@ -17117,7 +17117,7 @@ ${escapeText(this.code(index, length))}
   var quill_default = core_default;
 
   // app/javascript/active_admin.js
-  var import_activeadmin_quill_editor = __toESM(require_activeadmin_quill_editor());
+  var import_quill_editor = __toESM(require_quill_editor());
   window.Quill = quill_default;
   try {
     const ImageUploader = __require("quill-image-uploader");
@@ -17126,8 +17126,8 @@ ${escapeText(this.code(index, length))}
   }
   if (window.QuillEditor && window.QuillEditor.init) {
     window.QuillEditor.init();
-  } else if (import_activeadmin_quill_editor.default && import_activeadmin_quill_editor.default.init) {
-    import_activeadmin_quill_editor.default.init();
+  } else if (import_quill_editor.default && import_quill_editor.default.init) {
+    import_quill_editor.default.init();
   }
 })();
 /*! Bundled license information:

spec/dummy/app/javascript/active_admin.js

@@ -15,7 +15,7 @@ try {
 }
 
 // Import the Quill Editor initialization module
-import QuillEditorModule from 'activeadmin_quill_editor';
+import QuillEditorModule from 'activeadmin/quill_editor';
 
 // Now that Quill is available, initialize the editors
 // This ensures proper initialization order without setTimeout hacks

spec/dummy/esbuild.config.js

@@ -23,7 +23,7 @@ const config = {
   },
   // Use alias for clean imports
   alias: {
-    'activeadmin_quill_editor': path.join(gemPath, 'vendor/assets/javascripts/activeadmin_quill_editor.js')
+    'activeadmin/quill_editor': path.join(gemPath, 'vendor/assets/javascripts/activeadmin/quill_editor.js')
   }
 };