Improve ISO15693 listener timing and inventory handling

[OndrejMiko]

Summary

This improves NFC-V / ISO15693 listener behavior, especially for emulation and SLIX cards.

The change fixes listener response timing, adds support for selecting the response data rate from the reader request flags, improves ISO15693 inventory mask handling, and adds proper 16-slot inventory EOF flow handling. It also exposes more listener events so the NFC app can log received frames, CRC errors, transmitted responses, and field on/off transitions during emulation.

Changes

• Fix ISO15693 listener responses to use the data rate requested by the reader instead of always replying at high data rate.
• Add NFC-V fast listener timing support through the existing Momentum setting.
• Implement ISO15693 inventory mask matching against the UID bits.
• Implement 16-slot inventory handling by delaying the response until the matching EOF slot.
• Reset inventory/session state correctly when a new request or field-off event is received.
• Add ISO15693 listener events for:
  • field on
  • field off
  • valid request
  • request with CRC/error
  • transmitted response
• Forward the new ISO15693 events through the SLIX listener.
• Improve NFC app emulate logging for ISO15693 and SLIX:
  • FIELD ON
  • FIELD OFF
  • R: received request
  • E: received invalid/error frame
  • T: transmitted response
• Extend ISO15693 signal generation internals to prepare both single-subcarrier and dual-subcarrier frame banks.

Testing

• Verified the patch with git diff --check.
• Verified the generated patch applies cleanly on top of the upstream dev base commit.