Fill services.yaml for squeezebox (#28247)

* fill services.yaml for squeezebox

* Minor fix

homeassistant/components/squeezebox/services.yaml

@@ -0,0 +1,13 @@
+squeezebox_call_method:
+  description: Call a custom Squeezebox JSONRPC API.
+  fields:
+    entity_id:
+      description: Name(s) of the Squeezebox entities where to run the API method.
+      example: 'media_player.squeezebox_radio'
+    command:
+      description: Command to pass to Logitech Media Server (p0 in the CLI documentation).
+      example: 'playlist'
+    parameters:
+      description: Array of additional parameters to pass to Logitech Media Server (p1, ..., pN in the CLI documentation).
+      example: ["loadtracks", "album.titlesearch="]
+