Feat/LIVE-10694: add webview and feature flag for swap live app view in LLM

[kallen-ledger]

✅ Checklist

• npx changeset was attached.
• Covered by automatic tests.
• Impact of the changes:
  • ...

📝 Description

This PR aims to add conditional rendering of the swap live app under the feature flag ptxSwapLiveAppMobile.
By default this is disabled, when enabled the swap view will be redirected to the swap live app instead of native.

❓ Context

• https://ledgerhq.atlassian.net/browse/LIVE-10694

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🧐 Checklist for the PR Reviewers

• The code aligns with the requirements described in the linked JIRA or GitHub issue.
• The PR description clearly documents the changes made and explains any technical trade-offs or design decisions.
• There are no undocumented trade-offs, technical debt, or maintainability issues.
• The PR has been tested thoroughly, and any potential edge cases have been considered and handled.
• Any new dependencies have been justified and documented.
• Performance considerations have been taken into account. (changes have been profiled or benchmarked if necessary)

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