[WIP] Feature File Upload

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