Add electricitymaps free tier (#16799)

templates/definition/tariff/electricitymaps-free.yaml

@@ -0,0 +1,28 @@
+template: electricitymaps-free
+products:
+  - brand: Electricity Maps
+    description:
+      generic: Free API
+requirements:
+  description:
+    de: "CO₂-Daten für viele Länder von https://electricitymaps.com/. Der 'Free Personal Tier' beinhaltet leider keine Prognosedaten. Dafür benötigst du einen kommerziellen Account von https://api-portal.electricitymaps.com/. Kostenloser Testmonat verfügbar."
+    en: "CO₂ data for many countries from https://electricitymaps.com/. The 'Free Personal Tier' unfortunately does not include forecast data. You'll need a commercial account from https://api-portal.electricitymaps.com/. Free trial available."
+  evcc: ["skiptest"]
+group: co2
+params:
+  - name: token
+    required: true
+  - name: zone
+    required: true
+    example: "DE"
+    help:
+      de: "siehe https://api.electricitymap.org/v3/zones"
+      en: "see https://api.electricitymap.org/v3/zones"
+render: |
+  type: custom
+  price:
+    source: http
+    uri:  https://api.electricitymap.org/v3/carbon-intensity/latest?zone={{ .zone }}
+    headers:
+    - auth-token: {{ .token }}
+    jq: .carbonIntensity