Fix breadd skel config schema; remove temp live diagnostic

- breadd.toml: the shipped skel used a stale [adapters] schema
  (keyboard/mouse/touchpad/gamepad booleans); breadd 0.6.4 expects
  hyprland/udev/power/network/bluetooth structs. `bluetooth = true` collided
  with the real AdapterToggle field and aborted the daemon at startup.
- Drop the temporary bos-live-diag serial diagnostic now that the live-session
  failures are diagnosed.

iso/airootfs/etc/skel/.config/bread/breadd.toml

@@ -1,8 +1,21 @@
+# breadd daemon configuration.
+# Every section is optional and every adapter defaults to enabled; this file
+# just makes the defaults explicit. See the bread docs for the full schema.
+
+[daemon]
 log_level = "info"
 
-[adapters]
-keyboard = true
-mouse = true
-touchpad = true
-bluetooth = true
-gamepad = true
+[adapters.hyprland]
+enabled = true
+
+[adapters.udev]
+enabled = true
+
+[adapters.power]
+enabled = true
+
+[adapters.network]
+enabled = true
+
+[adapters.bluetooth]
+enabled = true