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-16-power-digit-sum.md

@@ -3,6 +3,7 @@ id: 5900f37d1000cf542c50fe8f
 title: 问题16：电源数字总和
 challengeType: 5
 videoUrl: ''
+dashedName: problem-16-power-digit-sum
 ---
 
 # --description--
@@ -29,5 +30,48 @@ assert.strictEqual(powerDigitSum(128), 166);
 assert.strictEqual(powerDigitSum(1000), 1366);
 ```
 
+# --seed--
+
+## --seed-contents--
+
+```js
+function powerDigitSum(exponent) {
+
+  return true;
+}
+
+powerDigitSum(15);
+```
+
 # --solutions--
 
+```js
+function powerDigitSum(exponent) {
+  const bigNum = [1];
+  let sum = 0;
+
+  for (let i = 1; i <= exponent; i++) {
+    let count = bigNum.length + 1;
+    let overflow = 0;
+    for (let j = 0; j < count; j++) {
+      let digit = bigNum[j] || 0;
+      digit = 2 * digit + overflow;
+
+      if (digit > 9) {
+        digit -= 10;
+        overflow = 1;
+      } else {
+        overflow = 0;
+      }
+
+      bigNum[j] = digit;
+    }
+  }
+
+  bigNum.forEach(function(num) {
+    return sum += num;
+  });
+
+  return sum;
+}
+```