[feat] update some feature

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

demo/llama_code_editor/app.py

@@ -0,0 +1,45 @@
+from fastapi import FastAPI
+from fastapi.responses import RedirectResponse
+from fastrtc import Stream
+from gradio.utils import get_space
+
+try:
+    from demo.llama_code_editor.handler import (
+        CodeHandler,
+    )
+    from demo.llama_code_editor.ui import demo as ui
+except (ImportError, ModuleNotFoundError):
+    from handler import CodeHandler
+    from ui import demo as ui
+
+
+stream = Stream(
+    handler=CodeHandler,
+    modality="audio",
+    mode="send-receive",
+    concurrency_limit=10 if get_space() else None,
+    time_limit=90 if get_space() else None,
+)
+
+stream.ui = ui
+
+app = FastAPI()
+
+
+@app.get("/")
+async def _():
+    url = "/ui" if not get_space() else "https://fastrtc-llama-code-editor.hf.space/ui/"
+    return RedirectResponse(url)
+
+
+if __name__ == "__main__":
+    import os
+
+    if (mode := os.getenv("MODE")) == "UI":
+        stream.ui.launch(server_port=7860, server_name="0.0.0.0")
+    elif mode == "PHONE":
+        stream.fastphone(host="0.0.0.0", port=7860)
+    else:
+        import uvicorn
+
+        uvicorn.run(app, host="0.0.0.0", port=7860)