Feature: add a proper entity for geographical unit layer

src/Bundle/ChillMainBundle/Entity/GeographicalUnitLayer.php

@@ -0,0 +1,56 @@
+<?php
+
+namespace Chill\MainBundle\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+
+/**
+ * @ORM\Table(name="chill_main_geographical_unit_layer")
+ * @ORM\Entity
+ */
+class GeographicalUnitLayer
+{
+
+    /**
+     * @ORM\Id
+     * @ORM\GeneratedValue
+     * @ORM\Column(type="integer")
+     */
+    private ?int $id = null;
+
+    /**
+     * @ORM\Column(type="json", nullable=false, options={"default": "[]"})
+     */
+    private array $name = [];
+
+    /**
+     * @ORM\Column(type="text", nullable=false, options={"default": ""})
+     */
+    private string $refId = '';
+
+    /**
+     * @return int|null
+     */
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    /**
+     * @return array
+     */
+    public function getName(): array
+    {
+        return $this->name;
+    }
+
+    /**
+     * @param array $name
+     * @return GeographicalUnitLayer
+     */
+    public function setName(array $name): GeographicalUnitLayer
+    {
+        $this->name = $name;
+        return $this;
+    }
+}