fix: Rationalize custom icons to avoid duplication (#1639)

docs/usage/README.md

@@ -11,6 +11,10 @@ See [2-way audio](2-way-audio.md) for documentation on using 2-way audio.
 
 See [Casting](casting.md) for documentation on casting the card.
 
+### Custom Icons
+
+See [Custom Icons](custom-icons.md) for custom icons this card supports.
+
 ### URL Actions
 
 See [URL Actions](url-actions.md) for documentation on acting based on URL contents.

docs/usage/_sidebar.md

@@ -6,6 +6,7 @@
 - [Usage](README.md)
   - [2-way audio](2-way-audio.md)
   - [Casting](casting.md)
+  - [Custom Icons](custom-icons.md)
   - [Keyboard Shortcuts](keyboard-shortcuts.md)
   - [URL Actions](url-actions.md)
 

docs/usage/custom-icons.md

@@ -0,0 +1,11 @@
+# Custom Icons
+
+The [`menu`](../configuration/menu.md) and
+[`status_bar`](../configuration/status-bar.md) both support a small set of
+builtin custom items not found in the traditional [Material Design Icons
+(`mdi`)](https://pictogrammers.com/library/mdi/) set by setting the relevant `icon` paramter to the following values.
+
+| Icon Name   | Resulting Icon                                                              |
+| ----------- | --------------------------------------------------------------------------- |
+| `frigate`   | ![Frigate Icon](../images/icons/frigate.svg ':size=24 :class=svg-icon')     |
+| `motioneye` | ![motionEye Icon](../images/icons/motioneye.svg ':size=24 :class=svg-icon') |