v0.12.2

This release fixes an issue with JAR builds of the CLI application, which refused to launch in 0.12.0 and 0.12.1.

We have also introduced a skill for AI agents to help them use LinkML.

What's Changed

• Warn about outdated gh in attest verify by @Ostrzyciel in #159
• Add agent skill (Claude Code, Codex, etc.) by @Ostrzyciel in #160

Full Changelog: v0.12.1...v0.12.2