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-1.md

@@ -5,50 +5,69 @@ challengeType: 5
 forumTopicId: 385326
 ---
 
-## Description
+# --description--
+
+**SHA-1** or **SHA1** is a one-way hash function; it computes a 160-bit message digest.
 
-<section id='description'>
-<b>SHA-1</b> or <b>SHA1</b> is a one-way hash function; it computes a 160-bit message digest.
 SHA-1 often appears in security protocols; for example, many HTTPS websites use RSA with SHA-1 to secure their connections.
+
 BitTorrent uses SHA-1 to verify downloads.
+
 Git and Mercurial use SHA-1 digests to identify commits.
-A US government standard, <a href="https://rosettacode.org/wiki/SHA-1/FIPS-180-1" target="_blank">FIPS 180-1</a>, defines SHA-1.
-</section>
 
-## Instructions
+A US government standard, [FIPS 180-1](https://rosettacode.org/wiki/SHA-1/FIPS-180-1), defines SHA-1.
+
+# --instructions--
 
-<section id='instructions'>
 Write a function that returns the SHA-1 message digest for a given string.
-</section>
 
-## Tests
+# --hints--
 
-<section id='tests'>
+`SHA1` should be a function.
 
-```yml
-tests:
-  - text: <code>SHA1</code> should be a function.
-    testString: assert(typeof SHA1 === 'function');
-  - text: <code>SHA1("abc")</code> should return a string.
-    testString: assert(typeof SHA1("abc") === 'string');
-  - text: <code>SHA1("abc")</code> should return <code>"a9993e364706816aba3e25717850c26c9cd0d89d"</code>.
-    testString: assert.equal(SHA1("abc"), "a9993e364706816aba3e25717850c26c9cd0d89d");
-  - text: <code>SHA1("Rosetta Code")</code> should return <code>"48c98f7e5a6e736d790ab740dfc3f51a61abe2b5"</code>.
-    testString: assert.equal(SHA1("Rosetta Code"), "48c98f7e5a6e736d790ab740dfc3f51a61abe2b5");
-  - text: <code>SHA1("Hello world")</code> should return <code>"7b502c3a1f48c8609ae212cdfb639dee39673f5e"</code>.
-    testString: assert.equal(SHA1("Hello world"), "7b502c3a1f48c8609ae212cdfb639dee39673f5e");
-  - text: <code>SHA1("Programming")</code> should return <code>"d1a946bf8b2f2a7292c250063ee28989d742cd4b"</code>.
-    testString: assert.equal(SHA1("Programming"), "d1a946bf8b2f2a7292c250063ee28989d742cd4b");
-  - text: <code>SHA1("is Awesome")</code> should return <code>"6537205da59c72b57ed3881843c2d24103d683a3"</code>.
-    testString: assert.equal(SHA1("is Awesome"), "6537205da59c72b57ed3881843c2d24103d683a3");
+```js
+assert(typeof SHA1 === 'function');
 ```
 
-</section>
+`SHA1("abc")` should return a string.
 
-## Challenge Seed
+```js
+assert(typeof SHA1('abc') === 'string');
+```
 
-<section id='challengeSeed'>
-<div id='js-seed'>
+`SHA1("abc")` should return `"a9993e364706816aba3e25717850c26c9cd0d89d"`.
+
+```js
+assert.equal(SHA1('abc'), 'a9993e364706816aba3e25717850c26c9cd0d89d');
+```
+
+`SHA1("Rosetta Code")` should return `"48c98f7e5a6e736d790ab740dfc3f51a61abe2b5"`.
+
+```js
+assert.equal(SHA1('Rosetta Code'), '48c98f7e5a6e736d790ab740dfc3f51a61abe2b5');
+```
+
+`SHA1("Hello world")` should return `"7b502c3a1f48c8609ae212cdfb639dee39673f5e"`.
+
+```js
+assert.equal(SHA1('Hello world'), '7b502c3a1f48c8609ae212cdfb639dee39673f5e');
+```
+
+`SHA1("Programming")` should return `"d1a946bf8b2f2a7292c250063ee28989d742cd4b"`.
+
+```js
+assert.equal(SHA1('Programming'), 'd1a946bf8b2f2a7292c250063ee28989d742cd4b');
+```
+
+`SHA1("is Awesome")` should return `"6537205da59c72b57ed3881843c2d24103d683a3"`.
+
+```js
+assert.equal(SHA1('is Awesome'), '6537205da59c72b57ed3881843c2d24103d683a3');
+```
+
+# --seed--
+
+## --seed-contents--
 
 ```js
 function SHA1(input) {
@@ -56,12 +75,7 @@ function SHA1(input) {
 }
 ```
 
-</div>
-</section>
-
-## Solution
-
-<section id='solution'>
+# --solutions--
 
 ```js
 function SHA1(input) {
@@ -163,5 +177,3 @@ function SHA1(input) {
   return hex_sha1(input);
 }
 ```
-
-</section>