libfprint-eh577

Use when adapting the EH575 work into an EH577 libfprint driver, editing the local WIP driver files, comparing against upstream libfprint Egis drivers, or building libfprint to validate the EH577 port.

Use when probing, replaying packets against, polling interrupts from, or collecting dumps/logs for the EgisTec EH577 fingerprint sensor. Covers the local usbfs probe workflow, expected EH575-compatible behavior, finger-interaction testing, and how to record results safely.

Use when creating, updating, or executing work plans for this repository. Defines the numbered plan file format under .agents/plans, the internal checklist style, and how plans should be maintained as the project todo list.