feat(template): add multiple page support to templates

pkg/svg/actions/page.go

@@ -3,6 +3,7 @@ package actions
 import (
 	"bytes"
 	"fmt"
+	"io"
 	"log"
 	"regexp"
 	"strconv"
@@ -34,6 +35,18 @@ func AddPage(id string, svgbuf []byte) (svg.TemplatePage, error) {
 	return data, nil
 }
 
+func GetPage(id string, page int) ([]byte, error) {
+	file, err := svg.Storage.Get(fmt.Sprintf(FILEFORMAT, id, page))
+
+	if err != nil {
+		return nil, err
+	}
+
+	defer file.Close()
+
+	return io.ReadAll(file)
+}
+
 func DeletePage(id string, page int) (bool, error) {
 	if success, err := database.DeleteSVGPage(id, page); err != nil || !success {
 		return success, err