refactor: introduce DI container (#4238)

* refactor: introduce DI container

* add bin/test

lib/Container.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+class Container implements \ArrayAccess
+{
+    private array $values = [];
+    private array $resolved = [];
+
+    public function offsetSet($offset, $value): void
+    {
+        $this->values[$offset] = $value;
+    }
+
+    #[ReturnTypeWillChange] public function offsetGet($offset)
+    {
+        if (!isset($this->values[$offset])) {
+            throw new \Exception(sprintf('Unknown container key: "%s"', $offset));
+        }
+        if (!isset($this->resolved[$offset])) {
+            $this->resolved[$offset] = $this->values[$offset]($this);
+        }
+        return $this->resolved[$offset];
+    }
+
+    #[ReturnTypeWillChange] public function offsetExists($offset)
+    {
+    }
+
+    public function offsetUnset($offset): void
+    {
+    }
+}