Remove jQuery from organization rename prompt toggle (#29195)

- Switched to plain JavaScript
- Tested the organization rename prompt toggling functionality and it
works as before

# Demo using JavaScript without jQuery

![action](https://github.com/go-gitea/gitea/assets/20454870/e6f641b0-aa46-4b85-9693-0d608cca855e)

---------

Signed-off-by: Yarden Shoham <git@yardenshoham.com>
Co-authored-by: silverwind <me@silverwind.io>

web_src/js/features/common-organization.js

@@ -1,14 +1,15 @@
-import $ from 'jquery';
 import {initCompLabelEdit} from './comp/LabelEdit.js';
 import {toggleElem} from '../utils/dom.js';
 
 export function initCommonOrganization() {
-  if ($('.organization').length === 0) {
+  if (!document.querySelectorAll('.organization').length) {
     return;
   }
 
-  $('.organization.settings.options #org_name').on('input', function () {
-    const nameChanged = $(this).val().toLowerCase() !== $(this).attr('data-org-name').toLowerCase();
+  const orgNameInput = document.querySelector('.organization.settings.options #org_name');
+  if (!orgNameInput) return;
+  orgNameInput.addEventListener('input', function () {
+    const nameChanged = this.value.toLowerCase() !== this.getAttribute('data-org-name').toLowerCase();
     toggleElem('#org-name-change-prompt', nameChanged);
   });