hyprlock: enable fingerprint auth path

hyprlock doesn't poll fprintd by default — pam_authenticate() is
only invoked on password submission. Adding the auth.fingerprint
block tells hyprlock to launch fprintd polling in parallel with the
password input, so touching the reader unlocks immediately without
typing first.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

hyprlock/hyprlock.conf

@@ -3,6 +3,15 @@ general {
     hide_cursor = true
 }
 
+auth {
+    fingerprint {
+        enabled = true
+        ready_message = Touch reader to unlock
+        present_message = Scanning…
+        retry_delay = 250
+    }
+}
+
 background {
     monitor =
     path = screenshot