Translate README to Arabic

[tobySolutions]

Please translate the README.md file located at https://github.com/GaiaNet-AI/gaianet-node/blob/main/README.md into Arabic.

The translated file for this is available at: https://github.com/GaiaNet-AI/gaianet-node/blob/main/README-ar.md

Please ensure the translation is accurate and maintains the original meaning and intent of the document.

[Jolah1]

I'll take this issue