feat(icon): add window-restore icon

[hervedombya]

TL;DR — Adds the FontAwesome window-restore glyph to the icon table so it can be used as <Icon name="Window-restore" />.

Context

Downstream apps need a "stacked windows / virtual machines" glyph that core-ui didn't expose yet. The Platform navigation in metalk8s currently inlines the SVG as a stopgap (scality/metalk8s#5127 — "inlined until core-ui ships this icon"). Shipping it here lets those apps drop the inline copy and use the shared component (with withWrapper, sizes, theming, etc.).

🔧 Usage

<Icon name="Window-restore" size="2x" withWrapper />

🔍 Review focus

• ⚪ iconTable.ts › 'Window-restore' — maps to fas faWindowRestore, which exists in @fortawesome/free-solid-svg-icons and resolves through the existing dynamic import in Icon.component (no extra registration). The key follows the table's Capitalized-name convention.

🧪 How to test

Render <Icon name="Window-restore" /> (e.g. in the Icon Storybook story): it shows the two-stacked-windows glyph, and size / withWrapper behave like any other icon, in both light and dark themes.

🔗 References

• feat(ui): add a Virtual Machines tab to the Platform navigation metalk8s#5127 — inlines this glyph as a stopgap until core-ui ships it (i.e. this PR).

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[bert-e]

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[hervedombya]

/approve

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