Update README-AR.md

[KhaledGharib]

Checklist:

• [x] I have read freeCodeCamp's contribution guidelines.
• [x] My pull request has a descriptive title (not a vague title like Update index.md)
• [x] My pull request targets the main branch of freeCodeCamp.

Closes #XXXXX

For further information available in issue #970

• [x] Header
• [x] Contributing to Open Source in general
• [x] Direct GitHub searches
• [x] Mozilla's contributor ecosystem
• [x] Useful articles for new Open Source contributors
• [x] Using Version Control Open Source books
• [x] Open Source books
• [x] Open Source contribution initiatives
• [x] Open Source programs to participate in License

[KhaledGharib]

This pull request aims to update the README-AR file in accordance with Arabic language conventions. This involves ensuring that the text is formatted from right to left (RTL) and translating any English content into Arabic to enhance readability for Arabic-speaking readers.

Additionally, if you have any valuable Arabic resources for Open Source content, such as books, articles, or even YouTube videos, please feel free to add them.

Issue: #970

[KhaledGharib]

For now, I've completed my task, and I'm optimistic that README-AR.md will continue to improve, aiding contributors to Open Source projects