Add FireANTs presets (Affine/SyN/IMPACT); optional-mask defaults; elastix skips non-restrictive masks

refactor: split elastix engine and type model parameters across presets

Update reg presets: mode knob + FOV evaluator + dimension-aware patch; models.json fetched from HF (unbundled)

Enable flip test-time augmentation on every preset

Show resolution level and metric in the registration progress bar

Add the generic uncertainty workflow to every preset

Restructure IMPACT-Reg into per-preset KonfAI apps