Implement attachments module with CRUD operations and integration points

- Added `attachments` module for creating, reading, updating, and deleting attachments.
- Introduced new classes such as `attachments`, `attachment_store`, `attachment_content`, and `attachment_relation` to handle attachment operations and their relationships.
- Integrated `attachments` features into `db_object_t` for seamless object-attachment interactions.
- Added `attachments_i` interface for standardized attachments module operations.
- Created `attachmentsRoute` for defining endpoints related to attachments.
- Enabled module configuration through `attachments_enabled_c` for attachment management control.

services/nginx/app/routes/attachmentsRoute.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace routes;
+
+use attachments\helpers\attachment;
+use attachments\helpers\attachment_content;
+use classes\attachments;
+use objects\orders_o;
+use traits\route_t;
+
+class attachmentsRoute
+{
+    use route_t;
+
+    public function run(): void
+    {
+        $this->get('/attachments/example', function () {
+            global $response;
+            throw new \Exception('EXAMPLE ROUTE, SHOULD BE IMPLEMENTED IN THE INDIVIDUAL OBJECT ROUTES');
+            $orders_o = new orders_o();
+            $orders_o->select(22636);
+            // Debug: Create an attachment
+            $orders_o->addAttachment((new attachment_content())->setOther('Hello World!'));
+            $response->success($orders_o->listAttachments());
+        });
+    }
+}