Refactor product relations to use new category_product and channel_product tables

- Updated queries and relationships in various controllers and models to replace `product_has_relations` with `category_product` and `channel_product`.
- Adjusted methods in `ProductFilterer`, `FilterParamsController`, and `FilterController` to reflect the new database structure.
- Modified seeder to insert data into the new `channel_product` table.
- Updated tests to ensure compatibility with the new product relation structure.

database/seeders/new/ProductsTableSeeder.php

@@ -45,10 +45,9 @@ class ProductsTableSeeder extends Seeder
                 });
 
                 $channel = $user ? $user->channel() : tmpostChannel();
-                DB::table('product_has_relations')->insert([
+                DB::table('channel_product')->insert([
                     'product_id' => $data['id'],
-                    'productable_id' => $channel->id,
-                    'productable_type' => 'channel',
+                    'channel_id' => $channel->id,
                 ]);
             }