fix(audio): fix audioTextResponse decode

[WqyJh]

The audio api passes audioTextResponse to sendRequest,

	if request.HasJSONResponse() {
		err = c.sendRequest(req, &response)
	} else {
		var textResponse audioTextResponse
		err = c.sendRequest(req, &textResponse)
		response = textResponse.ToAudioResponse()
	}

but it cannot be asserted as *string type, lead to decoding failure.

func decodeResponse(body io.Reader, v any) error {
	if v == nil {
		return nil
	}

	if result, ok := v.(*string); ok {
		return decodeString(body, result)
	}
	return json.NewDecoder(body).Decode(v)
}

Fix this problem.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4ce03a9) 98.43% compared to head (c4f4d18) 98.43%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #638   +/-   ##
=======================================
  Coverage   98.43%   98.43%           
=======================================
  Files          24       24           
  Lines        1342     1345    +3     
=======================================
+ Hits         1321     1324    +3     
  Misses         15       15           
  Partials        6        6           

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[sashabaranov]

@WqyJh thank you for the PR! Could you also please add a test for that?

[WqyJh]

Added test.

[sashabaranov]

@WqyJh thanks! There are some linter problems now

[sashabaranov]

we can reduce the amount of else by using early return pattern:

if something {
// code
    return
}

// else block

[WqyJh]

Of course! It would be better to use github.com/stretchr/testify/assert for testing, as it eliminates the need for if/else statements for assertions. However, I didn't use it because it doesn't have any external dependencies. Would you like to use it or keep it dependency-free?

[sashabaranov]

@WqyJh staying dependency free is important for the project, so let's not use the library. We have an internal lib of helpers though: https://github.com/sashabaranov/go-openai/blob/master/internal/test/checks/checks.go

[sashabaranov]

Thank you!