Add statistics feature with bookings tracking functionality

Introduce a scalable statistics architecture including `statistics` class, interface, and related implementations. Added support for tracking new bookings with routes and data handling through `bookings_s` and `statistic_t`. Integrated the feature into the application using autoloaders and response mechanisms.

services/nginx/app/statistics/bookings_s.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace statistics;
+
+use traits\statistic_t;
+
+class bookings_s
+{
+    use statistic_t;
+
+    public function get_new_bookings(): self
+    {
+        // Get the departments
+        $departments_o = new \objects\departments_o();
+        // Get the bookings
+        $bookings_o = new \objects\bookings_o();
+
+        // Get the bookings
+        $bookings = $bookings_o->getFields(['id', 'department', 'date']);
+        // Get the departments
+        $departments = $departments_o->getFields(['id', 'name']);
+        // Add the labels (months)
+        $this->labels = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
+        // Add the labels, and the data sets
+        foreach ( $departments as $department ) {
+            $tmp_department_monthly = [];
+            foreach ( $this->labels as $label ) {
+                $tmp_department_monthly[$label] = 0;
+            }
+            $this->add_data_set($department['name'], $tmp_department_monthly, ['backgroundColor' => '#FF0000']);
+        }
+        return $this;
+
+
+    }
+}