Add Readme example to example_test.go (#298)

* Add speech to text example in docs

* Add caption formats for audio transcription

* Add caption example to README

* Address sanity check errors

* Add tests for decodeResponse

* Use typechecker for audio response format

* Decoding response refactors

* Migrated examples to example_test.go

* Add some executable examples

* Update error docs

* Avoid linting example files which break conventions

* Restore README examples

* Enable linting for example_test

examples/completion/main.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"github.com/sashabaranov/go-openai"
+)
+
+func main() {
+	client := openai.NewClient(os.Getenv("OPENAI_API_KEY"))
+	resp, err := client.CreateCompletion(
+		context.Background(),
+		openai.CompletionRequest{
+			Model:     openai.GPT3Ada,
+			MaxTokens: 5,
+			Prompt:    "Lorem ipsum",
+		},
+	)
+	if err != nil {
+		fmt.Printf("Completion error: %v\n", err)
+		return
+	}
+	fmt.Println(resp.Choices[0].Text)
+}