create user role and menu, create seeder for first user and create crud role, menu and user

app/Models/Menu.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Menu extends Model
+{
+    protected $table = 'menus';
+    protected $fillable = [
+        'name',
+        'url',
+        'icon',
+        'parent_id',
+        'sort_order'
+    ];
+
+    public function roles(){
+        return $this->belongsToMany(Role::class, 'role_menu')->withTimestamps();
+    }
+
+    public function children(){
+        return $this->hasMany(Menu::class,'parent_id');
+    }
+}