[l10n] Improve Arabic (ar-SD) locale

[samuelwalk]

• I have followed (at least) the PR section of the contributing guide.

Added the proper Arabic translation with RTL support. The Unicode directional formatting characters "\u200e" ensure that the contents have a known direction.

You can see it working here: https://deploy-preview-20185--material-ui-x.netlify.app/x/react-data-grid/localization/#rtl-support

Closes #20125

[mui-bot]

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Deploy preview: https://deploy-preview-20185--material-ui-x.netlify.app/

Bundle size report

Bundle	Parsed size	Gzip size
@mui/x-data-grid	0B(0.00%)	0B(0.00%)
@mui/x-data-grid-pro	0B(0.00%)	0B(0.00%)
@mui/x-data-grid-premium	0B(0.00%)	0B(0.00%)
@mui/x-charts	0B(0.00%)	0B(0.00%)
@mui/x-charts-pro	0B(0.00%)	0B(0.00%)
@mui/x-charts-premium	0B(0.00%)	0B(0.00%)
@mui/x-date-pickers	0B(0.00%)	0B(0.00%)
@mui/x-date-pickers-pro	0B(0.00%)	0B(0.00%)
@mui/x-tree-view	0B(0.00%)	0B(0.00%)
@mui/x-tree-view-pro	0B(0.00%)	0B(0.00%)

Details of bundle changes

Generated by 🚫 dangerJS against 380c1c3

[samuelwalk]

@arminmeh Can you take a look since you asked me to contribute this change?

[arminmeh]

@samuelwalk, thank you for the contribution