feat: groups price calculator admin crud, booking/offer flow and api

src/Entity/TimestampableEntity.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+
+trait TimestampableEntity
+{
+    #[ORM\Column(type: 'datetime_immutable')]
+    private ?\DateTimeImmutable $createdAt = null;
+
+    #[ORM\Column(type: 'datetime_immutable', nullable: true)]
+    private ?\DateTimeImmutable $updatedAt = null;
+
+    public function getCreatedAt(): \DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function setCreatedAt(\DateTimeImmutable $createdAt): self
+    {
+        $this->createdAt = $createdAt;
+
+        return $this;
+    }
+
+    public function getUpdatedAt(): ?\DateTimeImmutable
+    {
+        return $this->updatedAt;
+    }
+
+    public function setUpdatedAt(\DateTimeImmutable $updatedAt): self
+    {
+        $this->updatedAt = $updatedAt;
+
+        return $this;
+    }
+}