tree: allow showing floating windows above fullscreen

jay-config/src/_private/ipc.rs

@@ -542,6 +542,10 @@ pub enum ClientMessage<'a> {
         connector: Connector,
         brightness: Option<f64>,
     },
+    SetFloatAboveFullscreen {
+        above: bool,
+    },
+    GetFloatAboveFullscreen,
 }
 
 #[derive(Serialize, Deserialize, Debug)]
@@ -690,6 +694,9 @@ pub enum Response {
     GetSocketPath {
         path: String,
     },
+    GetFloatAboveFullscreen {
+        above: bool,
+    },
 }
 
 #[derive(Serialize, Deserialize, Debug)]