fix(locale): update arabic translations

[Mosaab-Emam]

Description

I clarified, fixed, and completed translating all texts in ar.ts.

Fixes #16185

Motivation and Context

The Arabic locale file is not complete. Some texts are not translated, others have unclear translations.
Fixes #16185 opened by myself.

How Has This Been Tested?

Visually.

Markup:

None.

// Paste your FULL Playground.vue here

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Improvement/refactoring (non-breaking change that doesn't add any features but makes things better)

Checklist:

• The PR title is no longer than 64 characters.
• The PR is submitted to the correct branch (master for bug fixes and documentation updates, dev for new features and backwards compatible changes and next for non-backwards compatible changes).
• My code follows the code style of this project.
• I've added relevant changes to the documentation (applies to new features and breaking changes in core library)

[KaelWD]

@gimyboya @melbahja review this please

[khawarizmus]

Thank you for this PR @Mosaab-Emam. there was a lot of lousy and long translations in this file.

[Mosaab-Emam]

You are welcome @gimyboya, always happy to help.

I pushed a commit with a couple of your suggestions.

[khawarizmus]

@KaelWD @Mosaab-Emam LGTM.

[KaelWD]

Thanks @gimyboya