feat: add Scene7 transformer

[ascorbic]

That's awesome, thank you. There's a test failing right now. You can run it locally if you install Deno. There's instructions in the readme

[brianbento]

@ascorbic updated the failed test

[ascorbic]

Great, thanks! Sorry one more thing: can you update it to default to fit=crop. This is the standard behaviour for other transformers, and we need them to match. I'll unpade the contributing guidelines to make that clearer. Thanks!

[brianbento]

@ascorbic Added in the default crop

[ascorbic]

Perfect! Thanks for updating this