added models for stock assets from structures

app/Models/Stock/Structure.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Models\Stock;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Structure extends Model
+{
+    /**
+     * Requires the scope:
+     * esi-universe.read_structures.v1
+     */
+
+    //Table Name
+    public $table = '';
+
+    //Timestamps
+    public $timestamps = false;
+
+    /**
+     * The attributes that are mass assignable
+     * 
+     * @var array
+     */
+    protected $fillable = [
+        'name',
+        'owner_id',
+        'position_x',
+        'position_y',
+        'position_z',
+        'solar_system_id',
+        'type_id',
+    ];
+}