Remove global Google Analytics and simplify privacy package.

[pablo-mayrgundter]

• Don't even initialize GA when analytics user-pref is disabled.
• Changed gtags to react-ga4 npm. Update to use our GA4 ID.
• Simplify privacy package: use js-cookie npm and use simple wrappers for cookies we use: isAnalyticsEnabled, isFirstTime and theme preferences.

Tested locally by disabling msw and watching traffic in GA4 dashboard. Not showing up in netlify, but I do see netlify as a suggested domain in GA4 dashboard, so perhaps GA is just not turning itself on unless it's in a configured domain.

I suggest pushing this live and I verify it's live there.

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Lighthouse	1 paths audited Performance: 25 (🔴 down 2 from production) Accessibility: 84 (no change from production) Best Practices: 100 (no change from production) SEO: 92 (no change from production) PWA: - View the detailed breakdown and full score reports

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[pablo-mayrgundter]

PTAL

[pablo-mayrgundter]

@OlegMoshkovich fyi too. I apologize to both of you for the ugly cookie/privacy system before! 😬