Fix: add try catch when parsing streaming result from server

[nguyenhoangthuan99]

Fix #1273

Problem 1

1. cortex pull llama3.1-url , download is successful
2. cortex run llama3.1
3. Get interactive shell
4. Send "hi"
5. Get error

❯ cortex-nightly run llama3.1

Inorder to exit, type `exit()`

> hi

libc++abi: terminating due to uncaught exception of type nlohmann::json_abi_v3_11_3::detail::parse_error: [json.exception.parse_error.101] parse error at line 3, column 1: syntax error while parsing value - invalid literal; last read: '"chat.completion.chunk"}<U+000A><U+000A>d'; expected end of input

5![1]    93403 abort      cortex-nightly run llama3.1

This happened a few times

This problem due to nlohmann::json fail to parse content result from engine, this bug happened randomly. For that reason, we will add an try/catch logic to avoid this bug to crash the program and investigate easier.
This bug also appeared in Linux rarely and very hard to reproduce.

[dan-menlo]

Lgtm.

However, if it fails to parse, what is the recovery? (we just don't show anything?)

[nguyenhoangthuan99]

As the error log from ticket, this is the end of content that nlohmann::json tried to parse: '"chat.completion.chunk"}<U+000A><U+000A>d', the nlohmann::json received unexpected input so that it failed. Until now, this issue is challenge to recorver because we haven't know the exactly root cause yet. So we decided to add try catch, and add a warning log for esier to investigate later.