Refactor helper functions and update seeders

- Simplified `tmpostChannel` and `tmpostDefaultInventory` functions by removing caching logic.
- Changed return type of `namesWithTaxes` method in `CategoryRepository` to `mixed`.
- Enabled `ProductsTableSeeder` and added user association logic for product relations.
- Updated `BrandsSeeder` to include the product ID in the slug.
- Added `old_customer_id` to `options` in `SellersTableSeeder` for user tracking.

database/seeders/new/BrandsSeeder.php

@@ -19,7 +19,7 @@ class BrandsSeeder extends Seeder
         foreach ($datas as $data) {
             DB::table($table)->insertOrIgnore([
                 'id' => $data->id,
-                'slug' => Str::slug(json_decode($data->name)->en ?? $data->code),
+                'slug' => Str::slug(json_decode($data->name)->en ?? $data->code). '_' . $data->id,
                 'name' => $data->name,
                 'is_visible' => $data->is_blocked,
                 'sort_order' => $data->priority,