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-209-circular-logic.md

@@ -3,6 +3,7 @@ id: 5900f43e1000cf542c50ff4f
 title: 问题209：循环逻辑
 challengeType: 5
 videoUrl: ''
+dashedName: problem-209-circular-logic
 ---
 
 # --description--
@@ -21,5 +22,21 @@ x y x AND y000010100111x y x XOR y000011101110多个6输入二进制真值表τ
 assert.strictEqual(euler209(), 15964587728784);
 ```
 
+# --seed--
+
+## --seed-contents--
+
+```js
+function euler209() {
+
+  return true;
+}
+
+euler209();
+```
+
 # --solutions--
 
+```js
+// solution required
+```