shells/ammonite: Update to 2.5.1 and MOVE

The authors removed the shell functionality but it is still a good dev-tool.

Changelog

• Added support for Scala 2.13.8
• Re-added old Main entry point for better compatibility with Ammonite 2.4 and older
• Dropped built-in support for shell operations
• move from shells/ammonite to devel/ammonite

PR: 261191
Reported by: freebsd-ports@jan0sch.de (maintainer)