Update documentation for Entites card - special row button and confirmation (#14937)

Co-authored-by: Daniel Bohman <db@axiell.com>

source/_lovelace/entities.markdown

@@ -124,6 +124,10 @@ name:
   required: true
   description: Main Label.
   type: string
+icon:
+  required: false
+  description: An icon to display to the left of the label.
+  type: string
 action_name:
   required: false
   description: Button label.
@@ -361,6 +365,14 @@ entities:
     name: Home Assistant
     url: https://www.home-assistant.io/
     icon: mdi:home-assistant
+  - type: button
+    name: Power cycle LibreELEC
+    icon: mdi:power-cycle
+    tap_action:
+      action: call-service
+      confirmation:
+        text: Are you sure you want to restart?
+      service: script.libreelec_power_cycle
 ```
 
 <div class='note'>

source/lovelace/actions.markdown

@@ -167,6 +167,10 @@ double_tap_action:
   confirmation:
     text: Are you sure you want to restart?
   service: script.restart
+hold_action:
+  action: call-service
+  confirmation: true
+  service: script.do_other_thing
 ```
 
 {% configuration confirmation%}
@@ -185,10 +189,21 @@ exemptions:
 {% configuration exemptions %}
 user:
   required: true
-  description: User id that can see the view tab.
+  description: User id that can see the view tab. For each user´s id listed, the confirmation dialog will NOT be shown.
   type: string
 {% endconfiguration %}
 
+```yaml
+double_tap_action:
+  action: call-service
+  confirmation:
+    text: Are you sure you want to restart?
+    exemptions:
+      - x9405b8c64ee49bb88c42000e0a9dfa8
+      - 88bcfbdc39155d16c3b2d09cbf8b0367
+  service: script.restart
+```
+
 ## Examples
 
 Tap action implemented on an entity button card: