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/algorithms/no-repeats-please.md

@@ -3,6 +3,7 @@ id: a7bf700cd123b9a54eef01d5
 title: 请不要重复
 challengeType: 5
 videoUrl: ''
+dashedName: no-repeats-please
 ---
 
 # --description--
@@ -71,5 +72,53 @@ assert.strictEqual(permAlone('aaab'), 0);
 assert.strictEqual(permAlone('aaabb'), 12);
 ```
 
+# --seed--
+
+## --seed-contents--
+
+```js
+function permAlone(str) {
+  return str;
+}
+
+permAlone('aab');
+```
+
 # --solutions--
 
+```js
+function permAlone(str) {
+  return permuter(str).filter(function(perm) {
+    return !perm.match(/(.)\1/g);
+  }).length;
+}
+
+function permuter(str) {
+  // http://staff.roguecc.edu/JMiller/JavaScript/permute.html
+  //permArr: Global array which holds the list of permutations
+  //usedChars: Global utility array which holds a list of "currently-in-use" characters
+  var permArr = [], usedChars = [];
+  function permute(input) {
+    //convert input into a char array (one element for each character)
+    var i, ch, chars = input.split("");
+    for (i = 0; i < chars.length; i++) {
+      //get and remove character at index "i" from char array
+      ch = chars.splice(i, 1);
+      //add removed character to the end of used characters
+      usedChars.push(ch);
+      //when there are no more characters left in char array to add, add used chars to list of permutations
+      if (chars.length === 0) permArr[permArr.length] = usedChars.join("");
+      //send characters (minus the removed one from above) from char array to be permuted
+      permute(chars.join(""));
+      //add removed character back into char array in original position
+      chars.splice(i, 0, ch);
+      //remove the last character used off the end of used characters array
+      usedChars.pop();
+    }
+  }
+  permute(str);
+  return permArr;
+}
+
+permAlone('aab');
+```