[feat] update some feature

sync code of  fastrtc,
add text support through datachannel,
fix safari connect problem
support chat without camera or mic

docs/utils.md

@@ -51,4 +51,73 @@ Example
 >>> audio_tuple = (sample_rate, audio_data)
 >>> file_path = audio_to_file(audio_tuple)
 >>> print(f"Audio saved to: {file_path}")
+```
+
+## `aggregate_bytes_to_16bit`
+Aggregate bytes to 16-bit audio samples.
+
+This function takes an iterator of chunks and aggregates them into 16-bit audio samples.
+It handles incomplete samples and combines them with the next chunk.
+
+Parameters
+```
+chunks_iterator : Iterator[bytes]
+    An iterator of byte chunks to aggregate
+```
+Returns
+```
+Iterator[NDArray[np.int16]]
+    An iterator of 16-bit audio samples
+```
+Example
+```python
+>>> chunks_iterator = [b'\x00\x01', b'\x02\x03', b'\x04\x05']
+>>> for chunk in aggregate_bytes_to_16bit(chunks_iterator):
+>>>     print(chunk)
+```
+
+## `async_aggregate_bytes_to_16bit`
+
+Aggregate bytes to 16-bit audio samples asynchronously.
+
+Parameters
+```
+chunks_iterator : Iterator[bytes]
+    An iterator of byte chunks to aggregate
+```
+Returns
+```
+Iterator[NDArray[np.int16]]
+    An iterator of 16-bit audio samples
+```
+Example
+```python
+>>> chunks_iterator = [b'\x00\x01', b'\x02\x03', b'\x04\x05']
+>>> for chunk in async_aggregate_bytes_to_16bit(chunks_iterator):
+>>>     print(chunk)
+```
+
+## `wait_for_item`
+
+Wait for an item from an asyncio.Queue with a timeout.
+
+Parameters
+```
+queue : asyncio.Queue
+    The queue to wait for an item from
+timeout : float
+    The timeout in seconds
+```
+Returns
+```
+Any
+    The item from the queue or None if the timeout is reached
+```
+
+Example
+```python
+>>> queue = asyncio.Queue()
+>>> queue.put_nowait(1)
+>>> item = await wait_for_item(queue)
+>>> print(item)
 ```