Compact `asset` Folder

[Taufik Nurrohman]

Users should not be forced or advised to group files in folders with names such as the associated file extension.

Before

.\lot\layout\asset\
├── css\
│   └── index.css
├── js\
│   └── index.js
└── .htaccess

After

.\lot\layout\asset\
├── index.css
├── index.js
└── .htaccess