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/sedols.md

@@ -3,6 +3,7 @@ id: 59d9c6bc214c613ba73ff012
 title: SEDOLs
 challengeType: 5
 videoUrl: ''
+dashedName: sedols
 ---
 
 # --description--
@@ -51,5 +52,39 @@ assert(sedol('BOATER') === null);
 assert(sedol('228276') === '2282765');
 ```
 
+# --seed--
+
+## --seed-contents--
+
+```js
+function sedol(input) {
+
+  return true;
+}
+```
+
 # --solutions--
 
+```js
+function sedol(input) {
+  const checkDigit = sedolCheckDigit(input);
+  if (checkDigit !== null) {
+    return input + checkDigit;
+  }
+  return null;
+}
+
+const weight = [1, 3, 1, 7, 3, 9, 1];
+function sedolCheckDigit(char6) {
+  if (char6.search(/^[0-9BCDFGHJKLMNPQRSTVWXYZ]{6}$/) === -1) {
+    return null;
+  }
+
+  let sum = 0;
+  for (let i = 0; i < char6.length; i++) {
+    sum += weight[i] * parseInt(char6.charAt(i), 36);
+  }
+  const check = (10 - (sum % 10)) % 10;
+  return check.toString();
+}
+```