added the lost_window function

functions/lost_window.fish

@@ -0,0 +1,22 @@
+function lost_window
+    if not command -q hyprctl
+        echo "Only works with Hyprland compositor."
+        return 1
+    end
+
+    if test (count $argv) -lt 1
+        echo "Usage: lost_window <number>"
+        return 1
+    end
+
+    if test (count $argv) -lt 2
+        set addr (hyprctl clients -j \
+            | jq -r '.[] | select(.workspace.id == '$argv[1]') | .address' \
+            | head -n1)
+
+        test -n "$addr"; or return 1
+
+        hyprctl dispatch "hl.dsp.focus({window = 'address:$addr'})"
+    end
+
+end