Feat/viewable navigator in settings to testers and developers to view viewable feature flags

[sallem-consensys]

Description

This PR is to show users the fetched feature flags that they pulled from the launch darkly api.

Changelog

CHANGELOG entry: added viewable navigator in settings to testers and developers to view release flag

Related issues

Fixes:

Manual testing steps

Feature: Viewable Feature flags

  Scenario: user views feature flag dashboard
    Given basic functionality is toggled on

    When user navigates to settings Feature Flag Override
    Then they will see a dashboard to view the feature flags they have activated

Screenshots/Recordings

Before

no feature flag override page as it did not exist

After

preview-demo-feature-flag-override.mov

Pre-merge author checklist

• I’ve followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

---

Note

Updates locales/languages/zh.json with extensive Chinese translations and new keys (including sample_feature) across many app areas.

• Internationalization (i18n):
  • Update locales/languages/zh.json with large translation refresh and normalization.
  • Add new sections/keys, notably sample_feature, and numerous strings across alerts, deposits, perps, predict, rewards, bridge, staking, settings, etc.
  • Introduce/retain some English fallbacks for newly added keys where translations aren’t provided.

^{Written by Cursor Bugbot for commit ef5d4b8. This will update automatically on new commits. Configure here.}

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.