feat: bridge popular and search getTokens endpoints

[micaelae]

Explanation

References

Checklist

• [ ] I've updated the test suite for new or updated code as appropriate
• [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• [ ] I've communicated my changes to consumers by updating changelogs for packages I've changed, highlighting breaking changes as necessary
• [ ] I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes

---

[!NOTE] Introduce fetchPopularTokens and fetchTokensBySearchQuery with new BridgeAssetV2 type, add chainRanking to feature flags, and update exports and tests accordingly.

• Fetch utilities:
  • Add fetchPopularTokens to retrieve ranked tokens (optionally merged with user balances) from /getTokens/popular.
  • Add async generator fetchTokensBySearchQuery for paginated search from /getTokens/search, merging balances and handling cursors.
  • Extend client headers helper usage; no changes to existing quote fetching behavior.
• Types & Validators:
  • Introduce BridgeAssetV2 and TokenBalance types; add BridgeAssetV2Schema and validateSwapsAssetV2Object.
  • Use CaipChainIdStruct in schemas where applicable.
• Feature flags:
  • Add optional chainRanking to PlatformConfigSchema and include in defaults (DEFAULT_FEATURE_FLAG_CONFIG).
  • Tests updated to assert chainRanking handling.
• Public API:
  • Export new types (BridgeAssetV2, controller event/action types) and fetch functions (fetchPopularTokens, fetchTokensBySearchQuery).
• Tests:
  • Add/extend tests for new fetch endpoints, validators, feature flags, selectors, and SSE setup reflecting chainRanking.

^{Written by Cursor Bugbot for commit 4a10c25ddf80e9295b9a1c0aa4226ada5c85d421. This will update automatically on new commits. Configure here.}

[micaelae]

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[micaelae]

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