Feat: add new Markdown parser (#39800)

and change all the challenges to new `md` format.

curriculum/challenges/english/10-coding-interview-prep/rosetta-code/sha-256.md

@@ -5,46 +5,76 @@ challengeType: 5
 forumTopicId: 385328
 ---
 
-## Description
+# --description--
 
-<section id='description'>
-<b><a href="https://en.wikipedia.org/wiki/SHA-256" target="_blank">SHA-256</a></b> is the recommended stronger alternative to <a href="https://rosettacode.org/wiki/SHA-1" target="_blank">SHA-1</a>.
-</section>
+**[SHA-256](https://en.wikipedia.org/wiki/SHA-256)** is the recommended stronger alternative to [SHA-1](https://rosettacode.org/wiki/SHA-1).
 
-## Instructions
+# --instructions--
 
-<section id='instructions'>
 Write a function that takes a string as a parameter and returns its SHA-256 digest.
-</section>
 
-## Tests
+# --hints--
 
-<section id='tests'>
+`SHA256` should be a function.
 
-```yml
-tests:
-  - text: <code>SHA256</code> should be a function.
-    testString: assert(typeof SHA256 === 'function');
-  - text: <code>SHA256("Rosetta code")</code> should return a string.
-    testString: assert(typeof SHA256("Rosetta code") === 'string');
-  - text: <code>SHA256("Rosetta code")</code> should return <code>"764faf5c61ac315f1497f9dfa542713965b785e5cc2f707d6468d7d1124cdfcf"</code>.
-    testString: assert.equal(SHA256("Rosetta code"), "764faf5c61ac315f1497f9dfa542713965b785e5cc2f707d6468d7d1124cdfcf");
-  - text: <code>SHA256("SHA-256 Hash")</code> should return <code>"bee8c0cabdcf8c7835f40217dd35a8b0dba9134520e633f1c57285f35ca7ee3e"</code>.
-    testString: assert.equal(SHA256("SHA-256 Hash"), "bee8c0cabdcf8c7835f40217dd35a8b0dba9134520e633f1c57285f35ca7ee3e");
-  - text: <code>SHA256("implementation")</code> should return <code>"da31012c40330e7e21538e7dd57503b16e8a0839159e96137090cccc9910b171"</code>.
-    testString: assert.equal(SHA256("implementation"), "da31012c40330e7e21538e7dd57503b16e8a0839159e96137090cccc9910b171");
-  - text: <code>SHA256("algorithm")</code> should return <code>"b1eb2ec8ac9f31ff7918231e67f96e6deda83a9ff33ed2c67443f1df81e5ed14"</code>.
-    testString: assert.equal(SHA256("algorithm"), "b1eb2ec8ac9f31ff7918231e67f96e6deda83a9ff33ed2c67443f1df81e5ed14");
-  - text: <code>SHA256("language")</code> should return <code>"a4ef304ba42a200bafd78b046e0869af9183f6eee5524aead5dcb3a5ab5f8f3f"</code>.
-    testString: assert.equal(SHA256("language"), "a4ef304ba42a200bafd78b046e0869af9183f6eee5524aead5dcb3a5ab5f8f3f");
+```js
+assert(typeof SHA256 === 'function');
 ```
 
-</section>
+`SHA256("Rosetta code")` should return a string.
 
-## Challenge Seed
+```js
+assert(typeof SHA256('Rosetta code') === 'string');
+```
 
-<section id='challengeSeed'>
-<div id='js-seed'>
+`SHA256("Rosetta code")` should return `"764faf5c61ac315f1497f9dfa542713965b785e5cc2f707d6468d7d1124cdfcf"`.
+
+```js
+assert.equal(
+  SHA256('Rosetta code'),
+  '764faf5c61ac315f1497f9dfa542713965b785e5cc2f707d6468d7d1124cdfcf'
+);
+```
+
+`SHA256("SHA-256 Hash")` should return `"bee8c0cabdcf8c7835f40217dd35a8b0dba9134520e633f1c57285f35ca7ee3e"`.
+
+```js
+assert.equal(
+  SHA256('SHA-256 Hash'),
+  'bee8c0cabdcf8c7835f40217dd35a8b0dba9134520e633f1c57285f35ca7ee3e'
+);
+```
+
+`SHA256("implementation")` should return `"da31012c40330e7e21538e7dd57503b16e8a0839159e96137090cccc9910b171"`.
+
+```js
+assert.equal(
+  SHA256('implementation'),
+  'da31012c40330e7e21538e7dd57503b16e8a0839159e96137090cccc9910b171'
+);
+```
+
+`SHA256("algorithm")` should return `"b1eb2ec8ac9f31ff7918231e67f96e6deda83a9ff33ed2c67443f1df81e5ed14"`.
+
+```js
+assert.equal(
+  SHA256('algorithm'),
+  'b1eb2ec8ac9f31ff7918231e67f96e6deda83a9ff33ed2c67443f1df81e5ed14'
+);
+```
+
+`SHA256("language")` should return `"a4ef304ba42a200bafd78b046e0869af9183f6eee5524aead5dcb3a5ab5f8f3f"`.
+
+```js
+assert.equal(
+  SHA256('language'),
+  'a4ef304ba42a200bafd78b046e0869af9183f6eee5524aead5dcb3a5ab5f8f3f'
+);
+```
+
+# --seed--
+
+## --seed-contents--
 
 ```js
 function SHA256(input) {
@@ -52,12 +82,7 @@ function SHA256(input) {
 }
 ```
 
-</div>
-</section>
-
-## Solution
-
-<section id='solution'>
+# --solutions--
 
 ```js
 function SHA256(input) {
@@ -407,5 +432,3 @@ function SHA256(input) {
   return hex_sha2(input);
 }
 ```
-
-</section>