Add icl-runtime:+version+ and fix Emacs visualization refresh

- Add icl-runtime:+version+ dynamically injected from baked-in ICL version
- Hook additional Slynk/Swank functions for visualization refresh:
  - interactive-eval (C-x C-e)
  - eval-and-grab-output
  - pprint-eval
  - compile-string-for-emacs (C-c C-c)
- Update icl.el with matching hooks for Emacs integration
- Clear ~/.cache/icl/* in Makefile when building new image

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>