introduce TaskManager and PipelineRunner event loop

src/pipecat/frames/frames.py

@@ -12,6 +12,7 @@ from pipecat.audio.vad.vad_analyzer import VADParams
 from pipecat.clocks.base_clock import BaseClock
 from pipecat.metrics.metrics import MetricsData
 from pipecat.transcriptions.language import Language
+from pipecat.utils.asyncio import TaskManager
 from pipecat.utils.time import nanoseconds_to_str
 from pipecat.utils.utils import obj_count, obj_id
 
@@ -412,6 +413,7 @@ class StartFrame(SystemFrame):
     """This is the first frame that should be pushed down a pipeline."""
 
     clock: BaseClock
+    task_manager: TaskManager
     allow_interruptions: bool = False
     enable_metrics: bool = False
     enable_usage_metrics: bool = False