refactor: migrate challenge parser tests to vitest (#62186)

tools/challenge-parser/package.json

@@ -19,7 +19,7 @@
   "author": "freeCodeCamp <team@freecodecamp.org>",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "vitest"
   },
   "dependencies": {
     "hast-util-to-html": "7.1.3",
@@ -54,6 +54,7 @@
     "unist-util-visit-children": "1.1.4"
   },
   "devDependencies": {
-    "unist-util-select": "3.0.4"
+    "unist-util-select": "3.0.4",
+    "vitest": "^3.2.4"
   }
 }