Add ability to get playback-time

src/mpv/mpv.gleam

@@ -1,4 +1,5 @@
 import gleam/erlang/process.{type Subject}
+import gleam/float
 import gleam/otp/actor
 import gleam/result
 import gleam/string
@@ -44,10 +45,17 @@ fn handle_message(
   case control {
     control.TogglePlayPause -> {
       echo "toggling play/pause"
+
       let _ =
         result.map_error(control.toggle_play_pause(state.socket), fn(err) {
           echo "Could not toggle play/pause: " <> err.details
         })
+
+      let _ =
+        result.map(control.get_playback_time(state.socket), fn(playback) {
+          echo "playback: " <> float.to_string(playback.data)
+        })
+
       actor.continue(state)
     }
     control.Exit -> {