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/10-coding-interview-prep/rosetta-code/y-combinator.md

@@ -3,6 +3,7 @@ id: 594810f028c0303b75339ad5
 title: 和组合
 challengeType: 5
 videoUrl: ''
+dashedName: y-combinator
 ---
 
 # --description--
@@ -47,5 +48,32 @@ factorial（10）必须返回3628800。
 assert.equal(factorial(10), 3628800);
 ```
 
+# --seed--
+
+## --after-user-code--
+
+```js
+var factorial = Y(f => n => (n > 1 ? n * f(n - 1) : 1));
+```
+
+## --seed-contents--
+
+```js
+function Y(f) {
+  return function() {
+
+  };
+}
+
+var factorial = Y(function(f) {
+  return function (n) {
+    return n > 1 ? n * f(n - 1) : 1;
+  };
+});
+```
+
 # --solutions--
 
+```js
+var Y = f => (x => x(x))(y => f(x => y(y)(x)));
+```