chore: add lint rules for ordered lists in 操作 section and no HTML comments

- Enforce ordered lists (1. 2. 3.) in ## 操作 sections
- Forbid HTML comments in recipe files (template exempted)
- Convert all existing dishes to comply with new rules
- Fix vague measurements (少许 → 2段葱段) in 南派红烧肉
- Fix markdownlint MD032 (blanks around lists) across all files

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

dishes/vegetable_dish/白灼菜心/白灼菜心.md

@@ -1,7 +1,5 @@
 # 白灼菜心的做法
 
-<!-- 标题必须是 `菜名` + `的做法`。和文件名一致。 -->
-
 ![白灼菜心](./白灼菜心.jpg)
 
 > 没有拍照，上图是网图，不过做出来都差不多啦