Add bell-flagged circuits#10

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oscarhiggott wants to merge 7 commits intoquantumlib:mainfrom

oscarhiggott:bell-flagged

Commits on Nov 14, 2024

refactor bell flagged
oscarhiggott
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Commits on Sep 27, 2025

Change basis of detectors for bell-flagged circuit. Detectors are now just parities of consecutive measurements (or flags).
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