feat: add OpenAI embedding wrapper and in-memory vector index

internal/embedding/embedder.go

@@ -0,0 +1,28 @@
+package embedding
+
+import (
+	"context"
+
+	"github.com/cloudwego/eino-ext/components/embedding/openai"
+	"github.com/cloudwego/eino/components/embedding"
+)
+
+type Embedder struct {
+	impl embedding.Embedder
+}
+
+func NewEmbedder(ctx context.Context, apiKey, baseURL, model string) (*Embedder, error) {
+	impl, err := openai.NewEmbedder(ctx, &openai.EmbeddingConfig{
+		APIKey:  apiKey,
+		BaseURL: baseURL,
+		Model:   model,
+	})
+	if err != nil {
+		return nil, err
+	}
+	return &Embedder{impl: impl}, nil
+}
+
+func (e *Embedder) Embed(ctx context.Context, texts []string) ([][]float64, error) {
+	return e.impl.EmbedStrings(ctx, texts)
+}