Feature File Upload

### Upload File and show file list

* GET: /cmd/filr/
* GET: /cmd/filr/upload
* POST: /cmd/filr/upload

#### Tasks

- [x] Add routes
- [x] Add controller
- [x] Add migration for Filr
- [x] Add Filr Model
- [x] Add directory for upload files
- [x] Add upload view
- [x] Add POST file action
- [x] Add GET list action