feat(md-print): add A4/A5 multi-column print layout

Add an md-print element that paginates markdown into A4 landscape sheets holding two A5 pages, each with configurable columns. The preview modal exports through the browser print dialog. Paragraphs, lists, and tables split at word, item, and row boundaries; headings are kept with following content.
2026-10-23 11:00:59 +08:00
parent bd7871a800
commit 4a19336445
17 changed files with 1523 additions and 1 deletions
@@ -8,6 +8,7 @@ import "./md-border";
 import "./md-font";
 import "./md-embed";
 import "./md-deck";
+import "./md-print";
 import "./md-yarn-spinner";

 // 导出组件