Update landing page pricing + footer links and use anchors on policy pages

[SaravanakumarR2018]

Motivation

• Bring the new landing page into parity with the updated pricing layout and CTAs used on the old landing page.
• Provide simple, direct back navigation on legal pages by using plain anchors instead of client-side Links.
• Ensure the footer links point to canonical policy routes and include a Refund Policy entry.

Description

• Replaced the single pricing teaser with a three-card pricing layout (Starter Pack, Pro Pack, Enterprise Pack) in src/new-landingpage/src/LandingPage.tsx with updated copy and CTAs.
• Updated footer legal links in the new landing page to use direct routes: /privacy-policy, /terms-of-service, and /refund-policy.
• Replaced Link to="/" with plain <a href="/">Back to home</a> in src/frontend/src/pages/PrivacyPolicyPage/index.tsx, RefundPolicyPage/index.tsx, and TermsOfServicePage/index.tsx to provide direct navigation.
• Committed the LandingPage.tsx changes to the new landing page project.

Testing

• Ran npm install in src/new-landingpage which completed successfully (audit reported vulnerabilities to address separately).
• Started the dev server with npm run dev -- --host 0.0.0.0 --port 4174 and confirmed Vite reported the site as served.
• Attempted a Playwright script to capture a screenshot of the updated pricing section, but the Chromium run failed with a headless crash so the screenshot step failed.
• No unit test suites were executed as part of this change.

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Codex Task