FEAT: declare rule facts with TypedDict

[grayson-helmholz]

• Closes Type quantum-number maps and rule signatures with TypedDict #337

✨ New features

• qrules.quantum_numbers gains two TypedDicts, EdgeFacts and NodeFacts, that name every quantum number a state or interaction can carry. A conservation rule declares what it needs as a subset of these keys, for instance ChargeFacts with its single required key charge.
• RuleArgumentHandler and get_required_qns() now recognise TypedDict rule inputs next to the existing attrs composites and bare quantum-number types. The required keys of the TypedDict determine when a rule can be executed, and its full annotations determine which quantum numbers are passed in, so a rule states its run conditions in its own signature instead of relying on a separately declared input class.

This is a spike that converts a representative sample of rules: ChargeConservation, spin_magnitude_conservation, and helicity_conservation. The remaining rules keep their current input types, which is why both mechanisms coexist in RuleArgumentHandler.

⚠️ Interface changes

Rules that were converted now receive a list of dicts rather than a list of bare quantum-number values, so direct calls have to pass the quantum numbers by name. ChargeConservation no longer derives from the additive_quantum_number_rule() decorator but spells out its __call__, and the attrs class SpinMagnitudeNodeInput is replaced by a TypedDict.

Old name	New name
SpinMagnitudeNodeInput	SpinMagnitudeNodeFacts (a TypedDict)
spin_magnitude_conservation(ingoing_spin_magnitudes=[Fraction(1)], ...)	spin_magnitude_conservation(ingoing_spin_magnitudes=[{"spin_magnitude": Fraction(1)}], ...)
helicity_conservation(ingoing_spin_mags=[Fraction(1)], ...)	helicity_conservation(ingoing_spin_mags=[{"spin_magnitude": Fraction(1)}], ...)

Squash commit messages

* BREAK: pass rule facts as dicts keyed by QN name
* BREAK: replace SpinMagnitudeNodeInput with TypedDict