Register active custom asset definitions as orderable itemtypes (GLPI 11)

GLPI 11 introduced native custom assets defined via Setup → Asset
definitions. The plugin's hardcoded $ORDER_TYPES array in
plugin_init_order() does not include them, so custom asset classes
never appear in the Item type dropdown when creating a new Product
reference, making it impossible to order anything based on a custom
asset definition.

This commit adds an auto-registration loop that, after the existing
hardcoded itemtypes, iterates active custom asset definitions via
AssetDefinitionManager and appends each generated class name to
$ORDER_TYPES if not already present.

bootDefinitions() is called explicitly because the manager is
instantiated but not yet booted at plugin_init_order() time, so
getDefinitions() would otherwise return an empty array.

The class_exists() guard makes the block a no-op on GLPI <= 10.x,
preserving backward compatibility.

Tested on GLPI 11.0.6, PHP 8.3, with custom asset definitions on two
independent installations with different capacity sets:

- Custom asset appears in Product reference Item type dropdown.
- Type and Model dropdowns populate correctly via the existing
  itemtype + 'Type' / + 'Model' class name convention.
- Order validation, item delivery, Generate item massive action,
  and Reception flow all complete successfully end to end.
- The existing AssignableItem handling from #560 already works
  correctly with custom asset classes once they are registered as
  orderable itemtypes.

Author: bygadd

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [unreleased]
 
+### Added
+- Register active GLPI 11 custom asset definitions as orderable itemtypes
+
 ### Fixed
 
 - Fix generate associated item massive action

setup.php

@@ -125,6 +125,19 @@ function plugin_init_order()
             'Pdu',
         ];
 
+
+        // Auto-register all active custom assets defined via Asset definitions (GLPI 11+)
+        if (class_exists(\Glpi\Asset\AssetDefinitionManager::class)) {
+            $asset_manager = \Glpi\Asset\AssetDefinitionManager::getInstance();
+            $asset_manager->bootDefinitions();
+            foreach ($asset_manager->getDefinitions(true) as $definition) {
+                $custom_asset_class = $definition->getAssetClassName();
+                if (!in_array($custom_asset_class, $ORDER_TYPES, true)) {
+                    $ORDER_TYPES[] = $custom_asset_class;
+                }
+            }
+        }
+
         $CFG_GLPI['plugin_order_types'] = $ORDER_TYPES;
 
         $PLUGIN_HOOKS['pre_item_purge']['order'] = [