(#1) - WebPack bundling of JS and CSS (#1)

This work was done with Claude.

Added bundling of CSS & JS with WebPack. This also means minimization.

---------

Co-authored-by: Martin Slachta <martin.slachta@outlook.com>
Reviewed-on: #1

assets/js/forms/RsvAdminForm.js

@@ -1,3 +1,6 @@
+import { RsvFormEncoder } from './RsvFormEncoder.js';
+import { show_notice } from '../../../src/components/admin.js';
+
 /*
  * RsvAdminForm — shared submit handler for wp-admin forms.
  *
@@ -13,7 +16,7 @@
  *     refresh:   () => my_datagrid.refresh(),
  *   });
  */
-const RsvAdminForm = {
+export const RsvAdminForm = {
   // Attach a submit listener that sends the form as JSON.
   bind(form, options = {}) {
     if (!form) return;

assets/js/forms/RsvFormEncoder.js

@@ -1,4 +1,4 @@
-const RsvFormEncoder = {
+export const RsvFormEncoder = {
   // Serialize form element into a plain JS object supporting arrays.
   // - Nested keys supported with dot notation: 'meta.email'
   // - Array notation supported with trailing [] (e.g. 'times[]') or multiple inputs with same name

assets/js/forms/RsvFormSender.js

@@ -1,4 +1,4 @@
-const RsvFormSender = {
+export const RsvFormSender = {
   get_form_url(form_id) {
     return ReservairServiceAPI.restUrl + '/form/' + form_id;
   },

assets/js/forms/RsvInlineFormBuilder.js

@@ -1,4 +1,4 @@
-const RsvInlineFormBuilder = {
+export const RsvInlineFormBuilder = {
   match_p(name, value) {
     return (form) => String(form[name]) === String(value);
   },