feat(curriculum): add markdown converter lab (freeCodeCamp#56333)

Co-authored-by: Ilenia <[email protected]>
Co-authored-by: Tom <[email protected]>

Author: 3 people

client/i18n/locales/english/intro.json

@@ -2776,9 +2776,14 @@
           "Test what you've learned in this quiz on Debugging JavaScript."
         ]
       },
-      "dqth": { "title": "205", "intro": [] },
-      "ilop": { "title": "206", "intro": [] },
-      "qrer": { "title": "207", "intro": [] },
+      "ilop": { "title": "205", "intro": [] },
+      "dqth": { "title": "206", "intro": [] },
+      "lab-markdown-to-html-converter": {
+        "title": "Build a Markdown to HTML Converter",
+        "intro": [
+          "For this lab, you will build a Markdown to HTML converter using JavaScript."
+        ]
+      },
       "lab-regex-sandbox": {
         "title": "Build a RegEx Sandbox",
         "intro": ["In this lab you will build a regex sandbox."]

client/src/pages/learn/full-stack-developer/lab-markdown-to-html-converter/index.md

@@ -0,0 +1,9 @@
+---
+title: Introduction to the Build a Markdown to HTML Converter
+block: lab-markdown-to-html-converter
+superBlock: full-stack-developer
+---
+
+## Introduction to the Build a Markdown to HTML Converter
+
+For this lab, you will build a Markdown to HTML converter using JavaScript.

curriculum/challenges/_meta/lab-markdown-to-html-converter/meta.json

@@ -0,0 +1,11 @@
+{
+  "name": "Build a Markdown to HTML Converter",
+  "isUpcomingChange": true,
+  "usesMultifileEditor": true,
+  "blockType": "lab",
+  "blockLayout": "link",
+  "dashedName": "lab-markdown-to-html-converter",
+  "superBlock": "full-stack-developer",
+  "challengeOrder": [{ "id": "66f55eac933ff64ce654ca74", "title": "Build a Markdown to HTML Converter" }],
+  "helpCategory": "JavaScript"
+}