Remove run_to_queue and run from AIService class

src/dailyai/pipeline/merge_pipeline.py

@@ -0,0 +1,21 @@
+from typing import List
+from dailyai.pipeline.frames import EndFrame, EndPipeFrame
+from dailyai.pipeline.pipeline import Pipeline
+
+
+class SequentialMergePipeline(Pipeline):
+    """This class merges the sink queues from a list of pipelines. Frames from
+    each pipeline's sink are merged in the order of pipelines in the list."""
+    def __init__(self, pipelines:List[Pipeline]):
+        super().__init__([])
+        self.pipelines = pipelines
+
+    async def run_pipeline(self):
+        for pipeline in self.pipelines:
+            while True:
+                frame = await pipeline.sink.get()
+                if isinstance(frame, EndFrame) or isinstance(frame, EndPipeFrame):
+                    break
+                await self.sink.put(frame)
+
+        await self.sink.put(EndFrame())