[WIP] Add file-type resolver class.

### Overview

This class provides getting haik-file-type from mime-type.

`image/png` => `image`
`application/pdf` => `document`

#### Tasks

- [ ] Add TypeResolver class in Toiee\haik\File
- [ ] Define types e.g. `image`, `document`, `audio` ...
- [ ] Create converting table mime-type ←→ haik-file-type
- [ ] implement