fix(guide): restructure curriculum guide articles (#36501)

* fix: restructure certifications guide articles
* fix: added 3 dashes line before prob expl
* fix: added 3 dashes line before hints
* fix: added 3 dashes line before solutions

guide/english/certifications/front-end-libraries/react/create-a-simple-jsx-element/index.md

@@ -1,13 +1,22 @@
 ---
 title: Create a Simple JSX Element
 ---
-## Create a Simple JSX Element
+# Create a Simple JSX Element
+
+
+---
+## Solutions
+
+<details><summary>Solution 1 (Click to Show/Hide)</summary>
 
 This challenge is fairly simple, replace the div in the JSX element with h1
-  ```javascript
+```jsx
   const JSX=<h1></h1>;
-  ```
+```
 Then add the required text.
-  ```javascript
+
+```jsx
   const JSX = <h1>Hello JSX!</h1>;
-  ```
+```
+
+</details>