pipeline(task): introduce has_finished()

examples/foundational/05a-local-sync-speech-and-image.py

@@ -156,7 +156,7 @@ async def main():
             await runner.stop_when_done()
 
         async def run_tk():
-            while True:
+            while not task.has_finished():
                 tk_root.update()
                 tk_root.update_idletasks()
                 await asyncio.sleep(0.1)

examples/foundational/09a-local-mirror.py

@@ -48,15 +48,15 @@ async def main(room_url, token):
 
     pipeline = Pipeline([daily_transport.input(), tk_transport.output()])
 
-    runner = PipelineRunner()
+    task = PipelineTask(pipeline)
 
     async def run_tk():
-        while runner.is_active():
+        while not task.has_finished():
             tk_root.update()
             tk_root.update_idletasks()
             await asyncio.sleep(0.1)
 
-    task = PipelineTask(pipeline)
+    runner = PipelineRunner()
 
     await asyncio.gather(runner.run(task), run_tk())