✨ feat(mq-lang): support import aliasing with as

[harehare]

Summary

Allow import "path" as alias to bind an imported module under a custom name instead of its canonical module name, across the parser, CST, formatter, evaluator, HIR, and type checker.

Type of Change

• 🐛 Bug fix
• ✨ New feature
• ♻️ Refactor
• 📝 Documentation
• ⚡ Performance
• ✅ Test
• 📦 Build / dependencies
• 👷 CI

Checklist

• I ran cargo fmt and cargo clippy and addressed any warnings
• I ran just test-all and all tests pass
• I added or updated tests covering this change
• I updated relevant documentation (/docs, crate README.md) if needed
• I added a changelog entry if this is a user-facing change

Additional Context

[codspeed-hq]

Merging this PR will not alter performance

✅ 31 untouched benchmarks

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_{Comparing feat/import-alias (e82b9c5) with main (c054c03)¹}

Footnotes

1. No successful run was found on main (82ffb96) during the generation of this report, so c054c03 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩