Remove orca provider

[0xh3rman]

Summary

Removes the Orca provider from core-ts ahead of moving that implementation to Rust, applies the OKX DEX gas-limit guidance for EVM swaps that require approval, and folds in the currently open dependency update PRs.

Changes

• Removed Orca from the API provider registry and swapper package exports.
• Deleted the Orca provider implementation, route data model, fee helper, integration tests, and unit tests.
• Removed Orca-specific quote fixtures while leaving generated SwapProvider.ts unchanged.
• Dropped the Orca SDK dependencies and now-unused Solana kit/token helper dependencies from @gemwallet/swapper.
• Trimmed Solana helper code that was only used by the removed Orca provider.
• Updated the provider benchmark default away from Orca.
• Buffered OKX-provided EVM tx.gas by 50% when returning a provider gas limit for approval-backed swaps.
• Folded in dependency update PRs Bump oxlint from 1.61.0 to 1.62.0 #151, Bump @types/node from 25.5.0 to 25.6.0 #152, Bump dotenv from 17.3.1 to 17.4.2 #153, Bump oxfmt from 0.46.0 to 0.47.0 #155, and Bump knip from 6.3.0 to 6.6.2 #156:
  • oxlint 1.58.0 -> 1.61.0
  • @types/node 25.5.0 -> 25.6.0
  • dotenv 17.3.1 -> 17.4.2
  • oxfmt 0.43.0 -> 0.46.0
  • knip 6.3.0 -> 6.6.2

Validation

• pnpm build
• pnpm test
• pnpm lint
• pnpm dedupe --check
• pnpm install --frozen-lockfile --ignore-scripts
• git diff --check
• pnpm --filter @gemwallet/swapper test -- okx/provider.test.ts
• pnpm --filter @gemwallet/swapper build
• pnpm --filter @gemwallet/types test
• pnpm --filter @gemwallet/types build
• Targeted oxfmt --check for touched source files

Notes

The remaining OKX references to Orca are OKX aggregator route metadata, not the removed core-ts Orca provider.

[gemini-code-assist]

Code Review

This pull request removes the Orca Whirlpool provider from the swapper package, including its implementation, models, fee logic, and associated tests. Several Solana-related dependencies and utility functions were also removed, and the benchmarking scripts were updated to use stonfi_v2 as the default. Feedback was provided regarding an unused constant in the Solana transaction builder that should be removed as it is now dead code.