feat: Support stable swap ng pools

[chefjackson]

---

PR-Codex overview

The focus of this PR is to introduce gamification features, update stable swap SDK constants, and add new tokens for testing.

Detailed summary

• Added gamification to the configuration
• Updated FEE_DENOMINATOR constant in stable-swap-sdk
• Added new ERC20 tokens for testing in bscTestnet.ts
• Updated pool information in bscTestnet.ts
• Modified getStablePoolsOnChain function in onChainPoolProviders.ts

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}