Add Ntag5StatusReg and Ntag5ConfigReg (Register subclasses) and bind
them as tag.status_reg / tag.config_reg on the NTAG 5 platform. Purely
additive: every existing per-field accessor (disable_nfc, arbiter_mode,
sram_enable, ...) stays, and the config_reg setter re-syncs the
_arbiter_mode / _sram_enabled sibling caches the per-field setters keep,
so the sim internals are untouched.
- Ntag5StatusReg (0xA0): field/VCC/boot/lock/EEPROM/SRAM status bits
- Ntag5ConfigReg (0xA1): disable_nfc, arbiter_mode (normal/mirror/
pass-through/PHDC), sram_enable, config_pt_transfer_dir
Bit layout taken straight from the existing hand-rolled accessors, so
the register view decodes the very same bytes (cross-checked in tests).
5 new tests.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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