add price service to Tibber

source/_integrations/tibber.markdown

@@ -82,6 +82,54 @@ If you have a Tibber Pulse it will also show the electricity consumption in real
 
 </div>
 
+## Services
+
+The hourly prices are exposed using [service calls](/docs/scripts/service-calls/). The services populate [response data](/docs/scripts/service-calls#use-templates-to-handle-response-data) with price data.
+
+### Service `tibber.get_prices`
+
+Fetches hourly energy prices including price level.
+
+| Service data attribute | Optional | Description | Example |
+| ---------------------- | -------- | ----------- | --------|
+| `start` | yes | Start time to get prices. Defaults to today 00:00:00 | 2024-01-01 00:00:00 |
+| `end` | yes | End time to get prices. Defaults to tomorrow 00:00:00 | 2024-01-01 00:00:00 |
+
+#### Response data
+
+The response data is a dictionary with the energy prices for each Home.
+
+```json
+{
+  "prices": {
+    "Nickname_Home":[
+      {
+        "start_time": "2023-12-09 03:00:00+00:00",
+        "price": 0.46914,
+        "level": "VERY_EXPENSIVE"
+      },
+      {
+        "start_time": "2023-12-09 04:00:00+00:00",
+        "price": 0.46914,
+        "level": "VERY_EXPENSIVE"
+      }
+    ],
+    "Nickname_Home_2":[
+      {
+        "start_time": "2023-12-09 03:00:00+00:00",
+        "price": 0.46914,
+        "level": "VERY_EXPENSIVE"
+      },
+      {
+        "start_time": "2023-12-09 04:00:00+00:00",
+        "price": 0.46914,
+        "level": "VERY_EXPENSIVE"
+      }
+    ]
+  }
+}
+```
+
 ## Examples
 
 In this section, you will find some real-life examples of how to use this sensor.