Use Embeddables for EDACategoryInfo instead of a json column

src/Entity/EDA/EDAFootprintInfo.php

@@ -0,0 +1,47 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2023 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+
+namespace App\Entity\EDA;
+
+use Doctrine\DBAL\Types\Types;
+use Doctrine\ORM\Mapping\Column;
+use Doctrine\ORM\Mapping\Embeddable;
+
+#[Embeddable]
+class EDAFootprintInfo
+{
+    /** @var string|null The KiCAD footprint, which should be used (the path to the library) */
+    #[Column(type: Types::STRING, nullable: true)]
+    private ?string $kicad_footprint = null;
+
+    public function getKicadFootprint(): ?string
+    {
+        return $this->kicad_footprint;
+    }
+
+    public function setKicadFootprint(?string $kicad_footprint): EDAFootprintInfo
+    {
+        $this->kicad_footprint = $kicad_footprint;
+        return $this;
+    }
+}