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/project-euler/problem-284-steady-squares.md

@@ -3,6 +3,7 @@ id: 5900f4891000cf542c50ff9b
 title: 问题284：平稳正方形
 challengeType: 5
 videoUrl: ''
+dashedName: problem-284-steady-squares
 ---
 
 # --description--
@@ -23,5 +24,21 @@ videoUrl: ''
 assert.strictEqual(euler284(), '5a411d7b');
 ```
 
+# --seed--
+
+## --seed-contents--
+
+```js
+function euler284() {
+
+  return true;
+}
+
+euler284();
+```
+
 # --solutions--
 
+```js
+// solution required
+```