upd docs

docs/card-qr.md

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+# WiFi / QR Card
+
+![card-qr](img/card-qr.png)
+
+```yaml
+    cards:
+      - type: cardQR
+        title: Guest Wifi
+        qrCode: "WIFI:S:test_ssid;T:WPA;P:test_pw;;"
+        entities:
+          - entity: iText.test_ssid
+            name: Name
+            icon: mdi:wifi
+          - entity: iText.test_pw
+            name: Password
+            icon: mdi:key
+```
+
+List of supported config keys of this card:
+
+key | optional | type | default | description
+-- | -- | -- | -- | --
+`type` | False | string | `None` | Used by navigate items
+`entities` | False | complex | `None` | contains entities of the card, only valid on cardEntities and cardGrid and cardQR
+`title` | True | string | `None` | Title of the Page 
+`key` | True | string | `None` | Used by navigate items
+`qrCode` | False | string | `None` | Value of the qrCode
+
+List of supported entitiy types for this page:
+
+- switch
+- input_boolean
+- binary_sensor
+- sensor
+- button
+- scenes
+- script
+- input_button
+- light
+- input_text (read-only)
+- lock
+- automation
+
+The qrCode value is evaluated as a homeassistant Template, so it is possible to get values from HomeAssistant within the qrCode.
+
+`"WIFI:S:{{states('input_text.test_ssid')}};T:WPA;P:{{states('input_text.test_pw')}};;"`