Feature/sse (#3125)

* Base changes for ServerSide Events (instead of socket.io)

* lint fixes

* adding of interface and separate methods for streaming events

* lint

* first draft, handles both internal and external prediction end points.

* lint fixes

* additional internal end point for streaming and associated changes

* return streamresponse as true to build agent flow

* 1) JSON formatting for internal events
2) other fixes

* 1) convert internal event to metadata to maintain consistency with external response

* fix action and metadata streaming

* fix for error when agent flow is aborted

* prevent subflows from streaming and other code cleanup

* prevent streaming from enclosed tools

* add fix for preventing chaintool streaming

* update lock file

* add open when hidden to sse

* Streaming errors

* Streaming errors

* add fix for showing error message

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Co-authored-by: Henry <hzj94@hotmail.com>

packages/ui/package.json

@@ -14,6 +14,7 @@
         "@emotion/cache": "^11.4.0",
         "@emotion/react": "^11.10.6",
         "@emotion/styled": "^11.10.6",
+        "@microsoft/fetch-event-source": "^2.0.1",
         "@mui/base": "5.0.0-beta.40",
         "@mui/icons-material": "5.0.3",
         "@mui/lab": "5.0.0-alpha.156",