✨ feat(mq-lang): add _diff builtin and enhance assert_eq with colored diff output

[harehare]

No description provided.

[codspeed-hq]

Merging this PR will not alter performance

✅ 29 untouched benchmarks

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_{Comparing feat/diff-builtin (80c833b) with main (b02026a)¹}

Footnotes

1. No successful run was found on main (24b4815) during the generation of this report, so b02026a was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩