Add sketch library support.

[Jadyli]

https://github.com/panpf/sketch

[vinceglb]

Hi @Jadyli! How do you expect the integration between FileKit and sketch to work? What are your needs?

[Jadyli]

Just like coil: io.github.vinceglb:filekit-skecth，sketch is also a popular KMP image load library.

[vinceglb]

@Jadyli, I'm interested if you can help me with this one and submit a pull request to support sketch 🙏