整理master.blade.php將nav及footer拉出來

設partials資料夾新增nav.php及footer.php
將master.blade.php中nav和footer資料剪下分別貼在nav.php及footer.php

在master.blade.php中nav位置放

@include('partials.nav')

在master.blade.php中footer位置放

@include('partials.footer')