Initialize module and dependencies

vendor/github.com/sashabaranov/go-openai/common.go

@@ -0,0 +1,26 @@
+package openai
+
+// common.go defines common types used throughout the OpenAI API.
+
+// Usage Represents the total token usage per request to OpenAI.
+type Usage struct {
+	PromptTokens            int                      `json:"prompt_tokens"`
+	CompletionTokens        int                      `json:"completion_tokens"`
+	TotalTokens             int                      `json:"total_tokens"`
+	PromptTokensDetails     *PromptTokensDetails     `json:"prompt_tokens_details"`
+	CompletionTokensDetails *CompletionTokensDetails `json:"completion_tokens_details"`
+}
+
+// CompletionTokensDetails Breakdown of tokens used in a completion.
+type CompletionTokensDetails struct {
+	AudioTokens              int `json:"audio_tokens"`
+	ReasoningTokens          int `json:"reasoning_tokens"`
+	AcceptedPredictionTokens int `json:"accepted_prediction_tokens"`
+	RejectedPredictionTokens int `json:"rejected_prediction_tokens"`
+}
+
+// PromptTokensDetails Breakdown of tokens used in the prompt.
+type PromptTokensDetails struct {
+	AudioTokens  int `json:"audio_tokens"`
+	CachedTokens int `json:"cached_tokens"`
+}