- Add MirLikeInst::Print variant for direct output operations
- Implement Print instruction in JSON serialization
- Update simple_while_minimal.rs to use Print instead of BoxCall
- Add Print handling in JoinIR VM bridge and runner
- Add router logic to call Pattern 1 lowerer from main pipeline
Note: Router integration exposes ValueId mismatch issue between
Pattern 1's hardcoded IDs and host function's variables.
This architectural issue needs resolution in next phase.
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Co-Authored-By: Claude <noreply@anthropic.com>