Fix NumPy 2.0+ compatibility: replace deprecated trapz with trapezoid

[Copilot]

NumPy 2.0 removed the deprecated np.trapz function, causing runtime failures across simulations and analysis modules. All instances replaced with np.trapezoid.

Changes

Core fixes (6 occurrences across 5 files):

• theory/dynamics.py - memory kernel integration
• analysis/cp_divisibility.py - BLP measure calculation
• analysis/non_markovianity.py - BLP/RHP measure calculations (2×)
• simulations/resonance_statistics.py - resonance-time weights (2×)

Housekeeping:

• Added .gitignore for __pycache__ and build artifacts
• Removed committed bytecode files

Example

# Before (fails on NumPy 2.0+)
memory_int = np.trapz(integrand, times, axis=0)

# After
memory_int = np.trapezoid(integrand, times, axis=0)

Function signature and numerical behavior identical - pure compatibility fix.

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