many changes and more modularizing

hosts/fw-new/modules/home-assistant/snapcast.nix

@@ -0,0 +1,31 @@
+{
+  services.home-assistant = {
+    extraComponents = [ "snapcast" ];
+    config = {
+      "automation piano" = {
+        alias = "piano";
+        trigger = {
+          platform = "state";
+          entity_id = "media_player.music_piano_snapcast_client";
+          attribute = "is_volume_muted";
+        };
+        condition = [
+          {
+            condition = "template";
+            value_template = "{{ trigger.from_state.state != 'unavailable' }}";
+          }
+          {
+            condition = "template";
+            value_template = "{{ state_attr('media_player.music_piano_snapcast_client', 'is_volume_muted') == true or state_attr('media_player.music_piano_snapcast_client', 'is_volume_muted') == false }}";
+          }
+        ];
+        action = {
+          service = "switch.turn_on";
+          target = {
+            entity_id = "switch.piano_switch_power";
+          };
+        };
+      };
+    };
+  };
+}