Feature/CEC detection (#877)

* Add CEC functionality

* Initial commit

* removed libCEC from the system skip list

Co-authored-by: Paulchen Panther <16664240+Paulchen-Panther@users.noreply.github.com>

libsrc/api/JSONRPC_schema/schema-leddevice.json

@@ -22,7 +22,7 @@
 		"params": {
 			"type" : "object",
 			"required" : false
-		}					
+		}
 	},
 	"additionalProperties": false
 }