feat(curriculum): restore seed + solution to Chinese (#40683)

* feat(tools): add seed/solution restore script

* chore(curriculum): remove empty sections' markers

* chore(curriculum): add seed + solution to Chinese

* chore: remove old formatter

* fix: update getChallenges

parse translated challenges separately, without reference to the source

* chore(curriculum): add dashedName to English

* chore(curriculum): add dashedName to Chinese

* refactor: remove unused challenge property 'name'

* fix: relax dashedName requirement

* fix: stray tag

Remove stray `pre` tag from challenge file.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>

curriculum/challenges/chinese/01-responsive-web-design/css-grid/create-grids-within-grids.md

@@ -4,6 +4,7 @@ title: 在网格中创建网格
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/c6N78Ap'
 forumTopicId: 301128
+dashedName: create-grids-within-grids
 ---
 
 # --description--
@@ -34,5 +35,73 @@ class 为 `item3` 的元素应具有 `display` 属性且属性值应为 `grid`
 assert(code.match(/.item3\s*?{[\s\S]*display\s*?:\s*?grid\s*?;[\s\S]*}/gi));
 ```
 
+# --seed--
+
+## --seed-contents--
+
+```html
+<style>
+  .container {
+    font-size: 1.5em;
+    min-height: 300px;
+    width: 100%;
+    background: LightGray;
+    display: grid;
+    grid-template-columns: auto 1fr;
+    grid-template-rows: auto 1fr auto;
+    grid-gap: 10px;
+    grid-template-areas:
+      "advert header"
+      "advert content"
+      "advert footer";
+  }
+  .item1 {
+    background: LightSkyBlue;
+    grid-area: header;
+  }
+
+  .item2 {
+    background: LightSalmon;
+    grid-area: advert;
+  }
+
+  .item3 {
+    background: PaleTurquoise;
+    grid-area: content;
+    /* Only change code below this line */
+
+
+    /* Only change code above this line */
+  }
+
+  .item4 {
+    background: lightpink;
+    grid-area: footer;
+  }
+
+  .itemOne {
+    background: PaleGreen;
+  }
+
+  .itemTwo {
+    background: BlanchedAlmond;
+  }
+
+</style>
+
+<div class="container">
+  <div class="item1">header</div>
+  <div class="item2">advert</div>
+  <div class="item3">
+    <div class="itemOne">paragraph1</div>
+    <div class="itemTwo">paragraph2</div>
+  </div>
+  <div class="item4">footer</div>
+</div>
+```
+
 # --solutions--
 
+```html
+<style>.item3 {grid-template-columns: auto 1fr; display: grid;}</style>
+```