Split wake-up automation around restart-proof awake flag

Replace the monolithic Sleep Tracking Stopped automation with an
input_boolean.awake flag plus input_datetime.woke_up timestamp.
Bedroom light and bathroom music trigger on the flag, music now runs
weekdays only, and the 45-minute music stop uses a template trigger
against the stored timestamp instead of a delay so it survives
Home Assistant restarts.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/wakeup.yaml

@@ -0,0 +1,11 @@
+input_boolean:
+  awake:
+    name: Awake
+    icon: mdi:weather-sunny
+
+input_datetime:
+  woke_up:
+    name: Woke up
+    has_date: true
+    has_time: true
+    icon: mdi:alarm-check