graphics/dify: add new port

Dify is a fast pixel-by-pixel image comparison tool in Rust.

Features:
- .png, .jpg, .jpeg, or .bmp format supported
- Compares different format, .png vs .jpg for example
- Compares different dimensions
- Anti-aliasing support
- Blockout areas support
- Supports macOS, Linux and Windows

https://github.com/jihchi/dify