[WIP] Refactor GRAPE: Merged QTRL Code into QuTiP-QOC#50

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Akhils777 wants to merge 3 commits intoqutip:merged_qtrlfrom

Akhils777:merge_qtrl_into_qoc

Commits on Jul 2, 2025

Fix: Enable JOPT to support open-system optimization with TRACEDIFF fidelity (#49)
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Commits on Jul 17, 2025

First step-"Refactor _grape.py and _crab.py to use QOC-native structure"
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Commits on Jul 18, 2025

update pulse_optim.py, dynamics.py
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