refactor: replace Joomla-7-deprecated APIs (forward compatibility)

Removes accessors deprecated in Joomla 5 and slated for removal in 7
(extension already runs on 6; this future-proofs for 7):
- Factory::getDbo() -> Factory::getContainer()->get(DatabaseInterface::class)
  across plugins, controllers, static helpers, and the install script
- Factory::getUser() -> Factory::getApplication()->getIdentity()
- Factory::getSession() -> Factory::getApplication()->getSession()
- jexit(Text::_('JINVALID_TOKEN')) -> throw new \RuntimeException(..., 403),
  consistent with the access-denied checks already in those controllers

Note: SQL update-version concern is already resolved — the release bumped
to 01.05.00, which matches the 01.05.00.sql update slot.

source/packages/com_mokoog/src/Controller/BatchController.php

@@ -27,13 +27,13 @@ class BatchController extends BaseController
      */
     public function count(): void
     {
-        Session::checkToken('get') || jexit(Text::_('JINVALID_TOKEN'));
+        Session::checkToken('get') || throw new \RuntimeException(Text::_('JINVALID_TOKEN'), 403);
 
         if (!Factory::getApplication()->getIdentity()->authorise('core.create', 'com_mokoog')) {
             throw new \RuntimeException(Text::_('JLIB_APPLICATION_ERROR_ACCESS_FORBIDDEN'), 403);
         }
 
-        $db    = Factory::getDbo();
+        $db    = Factory::getContainer()->get(\Joomla\Database\DatabaseInterface::class);
         $query = $db->getQuery(true)
             ->select('COUNT(*)')
             ->from($db->quoteName('#__content', 'c'))
@@ -60,7 +60,7 @@ class BatchController extends BaseController
      */
     public function process(): void
     {
-        Session::checkToken('get') || jexit(Text::_('JINVALID_TOKEN'));
+        Session::checkToken('get') || throw new \RuntimeException(Text::_('JINVALID_TOKEN'), 403);
 
         if (!Factory::getApplication()->getIdentity()->authorise('core.create', 'com_mokoog')) {
             throw new \RuntimeException(Text::_('JLIB_APPLICATION_ERROR_ACCESS_FORBIDDEN'), 403);
@@ -69,7 +69,7 @@ class BatchController extends BaseController
         $app    = Factory::getApplication();
         $limit  = min($app->getInput()->getInt('limit', 50), 200);
 
-        $db    = Factory::getDbo();
+        $db    = Factory::getContainer()->get(\Joomla\Database\DatabaseInterface::class);
         $query = $db->getQuery(true)
             ->select($db->quoteName([
                 'c.id', 'c.title', 'c.metadesc', 'c.introtext', 'c.fulltext', 'c.images',