AVIF file icon
**Describe the requested icon(s)**
An icon for an AVIF file would be really nice. It should be similar to the `file-jpeg` and `file-png` icons, but with `AVIF` text underneath the file icon.

**References**
<img width="73" alt="JPEG file icon" src="https://github.com/phosphor-icons/homepage/assets/42250071/5fc70364-314d-40b4-ad86-f4724dc75a14">
