feat: add HCI profile for ProForm PFTL59720

[cagnulein]

Summary

• Add a dedicated HCI-snoop profile for the ProForm Carbon TL PFTL59720.
• Reproduce the captured I_TL initialization and polling sequence.
• Parse the PFTL59720 telemetry marker and support the captured incline command format.
• Add the profile to QZ settings and the treadmill model selector.
• Keep the existing PFTL59720 profile unchanged for other firmware variants.

Context

Thanks @ej.payne91 for providing the Bluetooth Snoop capture used to match this profile.

The treadmill exposes a proprietary I_TL interface alongside an FTMS-looking device. The dedicated profile avoids routing the device through the generic Horizon FTMS driver, which reported zero speed in the supplied capture.

Verification

• qmake src/qdomyos-zwift.pro CONFIG+=debug
• make -j2 — passed in a clean worktree
• git diff --check — passed
• settings-catalog.json validation — passed
• Verified that the HCI init sequence is in btinit() and the HCI polling sequence is in update()

Hardware control and telemetry still need validation on the contributor's treadmill.

[cagnulein]

mail from Eric Payne