[feat] update some feature

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

frontend/shared/VideoChat/icons/index.ts

@@ -0,0 +1,28 @@
+import './style.css'
+import IconFont from "./IconFont.svelte";
+import Send from "./Send.svelte";
+import Stop from "./Stop.svelte";
+import CameraOff from "./CameraOff.svelte";
+import CameraOn from "./CameraOn.svelte";
+import VolumeOff from "./VolumeOff.svelte";
+import VolumeOn from "./VolumeOn.svelte";
+import MicOff from "./MicOff.svelte";
+import MicOn from "./MicOn.svelte";
+import Check from "./Check.svelte";
+import PictureInPicture from "./PictureInPicture.svelte";
+import SideBySide from "./SideBySide.svelte";
+
+export {
+  IconFont,
+  CameraOff,
+  CameraOn,
+  VolumeOff,
+  VolumeOn,
+  MicOff,
+  MicOn,
+  Send,
+  Check,
+  PictureInPicture,
+  SideBySide,
+  Stop
+}