Add Energyzero get_gas_prices and get_energy_price services (#29143)

* Update energyzero.markdown

* Update energyzero.markdown

* Added required parameter

* Align wording with easyEnergy

* Set incl vat as required

---------

Co-authored-by: c0ffeeca7 <k0ffeeka7@gmail.com>

source/_integrations/energyzero.markdown

@@ -52,3 +52,100 @@ Every day around **14:00 UTC time**, the new prices are published for the follow
 For the dynamic gas prices, only entities are created that display the
 `current` and `next hour` price because the price is always fixed for
 24 hours; new prices are published every morning at **05:00 UTC time**.
+
+## Services
+
+The energy and gas 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 `energyzero.get_gas_prices`
+
+Fetches the gas prices.
+
+| Service data attribute | Optional | Description | Example |
+| ---------------------- | -------- | ----------- | --------|
+| `incl_vat` | no | Defines whether the prices include or exclude VAT. | false
+| `start` | yes | Start time to get prices. Defaults to today 00:00:00 | 2023-01-01 00:00:00
+| `end` | yes | End time to get prices. Defaults to today 00:00:00 | 2023-01-01 00:00:00
+
+### Response data
+
+The response data is a dictionary with the gas timestamps and prices as string and float values.
+
+{% raw %}
+
+```json
+{
+  "prices": [
+    {
+      "timestamp": "2023-09-25 03:00:00+00:00",
+      "price": 1.1
+    },
+    {
+      "timestamp": "2023-09-25 04:00:00+00:00",
+      "price": 1.05
+    }
+  ]
+}
+
+```
+
+{% endraw %}
+
+### Service `energyzero.get_energy_prices`
+
+Fetches the energy prices.
+
+| Service data attribute | Optional | Description | Example |
+| ---------------------- | -------- | ----------- | --------|
+| `incl_vat` | no | Defines whether the prices include or exclude VAT. | false
+| `start` | yes | Start time to get prices. Defaults to today 00:00:00 | 2023-01-01 00:00:00
+| `end` | yes | End time to get prices. Defaults to today 00:00:00 | 2023-01-01 00:00:00
+
+### Response data
+
+The response data is a dictionary with the energy timestamps and prices as string and float values.
+
+{% raw %}
+
+```json
+{
+  "prices": [
+    {
+      "timestamp": "2023-09-25 03:00:00+00:00",
+      "price": 0.05
+    },
+    {
+      "timestamp": "2023-09-25 04:00:00+00:00",
+      "price": 0.12
+    }
+  ]
+}
+```
+
+{% endraw %}
+
+### Add response to sensor
+
+The response data can be added to a template sensor:
+
+{% raw %}
+
+```yaml
+template:
+  - trigger:
+      - platform: time_pattern
+        hours: "*"
+    action:
+      - service: energyzero.get_energy_prices
+        response_variable: prices
+        data:
+          incl_vat: false
+    sensor:
+      - name: Energy prices
+        device_class: timestamp
+        state: "{{ now() }}"
+        attributes:
+          prices: '{{ prices }}'
+```
+
+{% endraw %}