Add Bashkit4j to Security

[tersePrompts]

Adds Bashkit4j to the Security section, alphabetically ordered.

Bashkit4j is an MIT-licensed Java SDK for running untrusted bash scripts in an in-process sandbox: a Rust-compiled virtual bash interpreter with an in-memory filesystem, no host access, network denied by default, and opt-in host-directory mounts behind a natively-enforced allowlist. Published on Maven Central (io.github.terseprompts:bashkit4j), Java 17+, native libraries bundled for Windows/Linux/macOS x64+ARM64.

• One entry under the appropriate category (Security), per the contributing guidelines
• Alphabetical placement (between Ayza and Bouncy Castle)

---

Summary by cubic

Adds Bashkit4j to the Security section of README_SOURCE.md, alphabetically placed between Ayza and Bouncy Castle. Bashkit4j is an MIT-licensed Java SDK for running untrusted bash scripts in an in-process sandbox with network denied by default and opt-in allowlisted host mounts.

^{Written for commit bc8b3f7. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 1 file

_{Re-trigger cubic}