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/fractran.md

@@ -3,6 +3,7 @@ id: 5a7dad05be01840e1778a0d1
 title: Fractran
 challengeType: 3
 videoUrl: ''
+dashedName: fractran
 ---
 
 # --description--
@@ -58,5 +59,54 @@ assert.deepEqual(
 );
 ```
 
+# --seed--
+
+## --seed-contents--
+
+```js
+function fractran(progStr) {
+
+}
+```
+
 # --solutions--
 
+```js
+function fractran(progStr){
+  var num = new Array();
+  var den = new Array();
+  var val ;
+  var out="";
+  function compile(prog){
+    var regex = /\s*(\d*)\s*\/\s*(\d*)\s*(.*)/m;
+    while(regex.test(prog)){
+      num.push(regex.exec(prog)[1]);
+      den.push(regex.exec(prog)[2]);
+      prog = regex.exec(prog)[3];
+    }
+  }
+
+  function step(val){
+    var i=0;
+    while(i<den.length && val%den[i] != 0) i++;
+    return num[i]*val/den[i];
+  }
+
+  var seq=[]
+
+  function exec(val){
+    var i = 0;
+    while(val && i<limit){
+      seq.push(val)
+      val = step(val);
+      i ++;
+    }
+  }
+
+  // Main
+  compile(progStr);
+  var limit = 10;
+  exec(2);
+  return seq;
+}
+```