refactor: extract PSR-12 renames and independent bugfixes from plugin system PR (#4784)

build/refactor/fix: tighten tooling, rename accessors to camelCase, and correct model bugs

* build: tighten gitignore, lockfile, and script config
- gitignore /build and /.php-cs-fixer.cache
- allow core-js@3.50.0 postinstall script in package.json

* refactor: rename snake_case data accessors to camelCase
Rename get_info, get_multiple_info, get_sale_items, get_sale_payments,
and save_customer across Customer, Employee, Item, Sale, and Supplier
models to PSR-12 camelCase, updating every call site in controllers,
libraries, and views.

* test: update calls to match renamed camelCase accessors
Update HomeTest, ItemsControllerTest, and ItemTest to call
getInfo()/getMultipleInfo() instead of the old snake_case model methods.

* fix: correct independent bugs in Item, Item_taxes, and Attribute models
- Item::delete()/delete_list(): let $this->db->transStatus() alone decide
  success instead of accumulating a bitwise-AND over intermediate results,
  which could report failure (and trigger error toasts) even when the
  delete had actually completed
- Item_taxes: correct $table property from 'item_taxes' to 'items_taxes'
- Attribute::getDefinitionNames(): pass an array to
  QueryBuilder->whereNotIn(), which requires one

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

tests/Controllers/ItemsControllerTest.php

@@ -552,7 +552,7 @@ class ItemsControllerTest extends CIUnitTestCase
         $this->assertIsInt((int) $row->item_id);
         $this->assertGreaterThan(0, (int) $row->item_id);
 
-        $savedItem = $this->item->get_info((int) $row->item_id);
+        $savedItem = $this->item->getInfo((int) $row->item_id);
         $this->assertEquals('CSV Imported Item', $savedItem->name);
         $this->assertEquals('Description from CSV', $savedItem->description);
         $this->assertEquals('Electronics', $savedItem->category);
@@ -749,7 +749,7 @@ class ItemsControllerTest extends CIUnitTestCase
 
         $this->assertTrue($this->item->save_value($updatedData, $updatedData['item_id']));
 
-        $updatedItem = $this->item->get_info($updatedData['item_id']);
+        $updatedItem = $this->item->getInfo($updatedData['item_id']);
         $this->assertEquals('Updated Name', $updatedItem->name);
         $this->assertEquals('Updated Category', $updatedItem->category);
         $this->assertEquals(15.00, (float)$updatedItem->cost_price);
@@ -939,7 +939,7 @@ class ItemsControllerTest extends CIUnitTestCase
 
         $this->assertTrue($this->item->save_value($itemData));
 
-        $savedItem = $this->item->get_info($itemData['item_id']);
+        $savedItem = $this->item->getInfo($itemData['item_id']);
         $this->assertEquals(-1, (int)$savedItem->reorder_level);
     }
 
@@ -978,7 +978,7 @@ class ItemsControllerTest extends CIUnitTestCase
 
             $this->assertTrue($this->item->save_value($itemData));
 
-            $savedItem = $this->item->get_info($itemData['item_id']);
+            $savedItem = $this->item->getInfo($itemData['item_id']);
 
             $this->assertSame(
                 $case['expected_cost_price'],
@@ -1008,7 +1008,7 @@ class ItemsControllerTest extends CIUnitTestCase
 
         $this->assertTrue($this->item->save_value($itemData));
 
-        $savedItem = $this->item->get_info($itemData['item_id']);
+        $savedItem = $this->item->getInfo($itemData['item_id']);
         $this->assertEquals('8471', $savedItem->hsn_code);
     }
 
@@ -1101,7 +1101,7 @@ class ItemsControllerTest extends CIUnitTestCase
         $this->assertIsInt($itemData['item_id']);
         $this->assertGreaterThan(0, $itemData['item_id']);
 
-        $savedItem = $this->item->get_info($itemData['item_id']);
+        $savedItem = $this->item->getInfo($itemData['item_id']);
         $this->assertEquals('Item Without Barcode', $savedItem->name);
     }
 
@@ -1195,7 +1195,7 @@ class ItemsControllerTest extends CIUnitTestCase
         ];
         $this->inventory->insert($inventoryData);
 
-        $savedItem = $this->item->get_info($itemData['item_id']);
+        $savedItem = $this->item->getInfo($itemData['item_id']);
         $this->assertEquals('Complete Test Item', $savedItem->name);
         $this->assertEquals('Electronics', $savedItem->category);
         $this->assertEquals(50.00, (float)$savedItem->cost_price);