Add org.eclipse.jgit.ssh.jsch stable-5.13 fork

[bryceatmoderne]

What's changed?

Added fork of org.eclipse.jgit.ssh.jsch to support JSch-based ssh transport git requests

What's your motivation?

Provides an alternative to process-based ssh requests using TransportGitSsh

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

No

Anyone you would like to review specifically?

@sambsnyd @timtebeek

Have you considered any alternatives or workarounds?

No

Any additional context

Swapped com.jcraft.jsch dependency with com.github.mwiede for support of current SSH key types

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

[timtebeek]

Can't say I know much about how we use this for a meaningful review; does this relate to this issue updated yesterday?

• CVE-2023-4759 vulnerability in JGit <= 6.6.0 rewrite#3620

Perhaps @knutwannheden might know more than me for a review.

[okundzich]

Would you provide a description for this change? @bryceatmoderne