Add literal binary patch support

[shanman190]

What's changed?

Added support for generation of Git binary patches using the literal format style.

What's your motivation?

There is a need to support representing binary files within a patch file.

Anything in particular you'd like reviewers to focus on?

This diverges us from upstream JGit which does not support writing Git binary patch files at all (it does support reading and applying them). The changes are minimally invasive, but would pose merge conflicts against the upstream. This probably isn't a large concern given we're needing to support Java 8+ (thus the reason for forking the project originally).

Anyone you would like to review specifically?

Anybody

Have you considered any alternatives or workarounds?

We could externalize the changes into new classes or place these updates further downstream in rewrite proper, but this felt like the right place to at least get started with a review.

Any additional context

N/A

Checklist

• I've added unit tests to cover both positive and negative cases
• I've read and applied the recipe conventions and best practices
• I've used the IntelliJ IDEA auto-formatter on affected files