feat(md-print): add timestamp footer option

src/components/md-print/config.ts

@@ -7,6 +7,7 @@ export const PRINT_DEFAULTS: PrintConfig = {
   font: 3,
   title: "",
   pageNumbers: true,
+  timestamp: false,
   cutMarks: true,
 };
 
@@ -47,6 +48,7 @@ export function normalizePrintConfig(
     title:
       typeof input.title === "string" ? input.title : PRINT_DEFAULTS.title,
     pageNumbers: toBoolean(input.pageNumbers, PRINT_DEFAULTS.pageNumbers),
+    timestamp: toBoolean(input.timestamp, PRINT_DEFAULTS.timestamp),
     cutMarks: toBoolean(input.cutMarks, PRINT_DEFAULTS.cutMarks),
   };
 }