Add entity to denote ongoing server maintenance

packages/announcements.yaml

@@ -239,6 +239,9 @@ script:
   server_maintenance_annc:
     alias: Server Maintenance Announcement
     sequence:
+    - service: input_boolean.turn_on
+      target:
+        entity_id: input_boolean.server_maintenance
     - service: script.status_annc
       data:
         who: "{{ who|default('everywhere') }}"
@@ -248,6 +251,9 @@ script:
   server_maintenance_done_annc:
     alias: Server Maintenance Done Announcement
     sequence:
+    - service: input_boolean.turn_off
+      target:
+        entity_id: input_boolean.server_maintenance
     - service: script.status_annc
       data:
         who: "{{ who|default('everywhere') }}"

packages/sysmon.yaml

@@ -1,3 +1,8 @@
+input_boolean:
+  server_maintenance:
+    name: Server Maintenance
+    icon: mdi:wrench-clock
+
 input_select:
   log_level:
     name: Log Level