07_reverseString: handle Unicode surrogate pairs in reverseString solution

[eyad-alkhalidy]

Because

The original reverseString solution used .split(""), which does not handle complex Unicode characters correctly. This can lead to incorrect behavior when the input includes surrogate pairs (e.g., emojis or some accented characters). This PR modifies the implementation to avoid that issue and includes a comment to make learners aware of the underlying limitation.

This PR

• Updated the reverseString solution to use Array.from() instead of .split("")
• Added a comment explaining the issue with surrogate pairs and Unicode handling in JavaScript

Issue

N/A

Additional Information

We've already been exposed to this problem in the MDN Reference page for String, linked here. This is why I think we can consider it in this exercise.

Pull Request Requirements

• [x] I have thoroughly read and understand The Odin Project Contributing Guide
• [x] The title of this PR follows the location of change: brief description of change format, e.g. 01_helloWorld: Update test cases
• [x] The Because section summarizes the reason for this PR
• [x] The This PR section has a bullet point list describing the changes in this PR
• [x] If this PR addresses an open issue, it is linked in the Issue section
• [x] If this PR includes any changes that affect the solution of an exercise, I've also updated the solution in the /solutions folder