feat: revamp Enterprise page

[wackerow]

Description

• Revamps /enterprise page per new designs
• Updates existing markdown enterprise page to /enterprise/use-cases/, re-ordering sections and adding CTA buttons
• SSR approach with loading elements for heavier client-side tasks

Preview link

https://deploy-preview-15647--ethereumorg.netlify.app/en/enterprise

Related Issue

[netlify[bot]]

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Lighthouse	7 paths audited Performance: 42 (🔴 down 13 from production) Accessibility: 95 (🟢 up 1 from production) Best Practices: 91 (🔴 down 8 from production) SEO: 99 (no change from production) PWA: 59 (no change from production) View the detailed breakdown and full score reports

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