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/averages-root-mean-square.md

@@ -3,6 +3,7 @@ id: 594da033de4190850b893874
 title: 平均值 - 均方根
 challengeType: 5
 videoUrl: ''
+dashedName: averagesroot-mean-square
 ---
 
 # --description--
@@ -23,5 +24,28 @@ assert(typeof rms === 'function');
 assert.equal(rms(arr1), answer1);
 ```
 
+# --seed--
+
+## --after-user-code--
+
+```js
+const arr1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+const answer1 = 6.2048368229954285;
+```
+
+## --seed-contents--
+
+```js
+function rms(arr) {
+
+}
+```
+
 # --solutions--
 
+```js
+function rms(arr) {
+  const sumOfSquares = arr.reduce((s, x) => s + x * x, 0);
+  return Math.sqrt(sumOfSquares / arr.length);
+}
+```