Add ProjecFile and TaskFile models

app/Model/ProjectFile.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace Kanboard\Model;
+
+/**
+ * Project File Model
+ *
+ * @package  model
+ * @author   Frederic Guillot
+ */
+class ProjectFile extends File
+{
+    /**
+     * SQL table name
+     *
+     * @var string
+     */
+    const TABLE = 'project_has_files';
+
+    /**
+     * SQL foreign key
+     *
+     * @var string
+     */
+    const FOREIGN_KEY = 'project_id';
+
+    /**
+     * Path prefix
+     *
+     * @var string
+     */
+    const PATH_PREFIX = 'projects';
+
+    /**
+     * Events
+     *
+     * @var string
+     */
+    const EVENT_CREATE = 'project.file.create';
+}