feat: support gemini ai model (#1173)

plugins/wasm-go/extensions/ai-proxy/provider/model.go

@@ -161,3 +161,22 @@ type embedding struct {
 	Index     int       `json:"index"`
 	Embedding []float64 `json:"embedding"`
 }
+
+func (r embeddingsRequest) ParseInput() []string {
+	if r.Input == nil {
+		return nil
+	}
+	var input []string
+	switch r.Input.(type) {
+	case string:
+		input = []string{r.Input.(string)}
+	case []any:
+		input = make([]string, 0, len(r.Input.([]any)))
+		for _, item := range r.Input.([]any) {
+			if str, ok := item.(string); ok {
+				input = append(input, str)
+			}
+		}
+	}
+	return input
+}