feat: add database.s3 support

internal/database/s3/s3.go

@@ -0,0 +1,25 @@
+package s3
+
+import (
+	"context"
+	"io"
+)
+
+type meta struct {
+	ContentType string `json:"content_type"`
+	Size        int64  `json:"size"`
+	ExpireAt    int64  `json:"expire_at"`
+}
+
+type Object struct {
+	ContentType string
+	Body        io.ReadCloser
+	Size        int64
+	ExpireAt    int64
+}
+
+type S3 interface {
+	Get(ctx context.Context, bucket, key string) (*Object, error)
+	Put(ctx context.Context, bucket, key string, obj *Object) error
+	Delete(ctx context.Context, bucket, key string) error
+}