Add Shiba Inu (SHIB) support for trading and funding accounts

Enable full Shiba Inu (SHIB) support across funding and trading accounts so users can hold, deposit, withdraw, and trade SHIB. Use case: capture demand from the SHIB community, increase user acquisition and trading volume by offering a widely used token. Expected behavior: users can deposit SHIB to their funding accounts and see accurate on‑chain confirmations and balances; initiate withdrawals with applicable network fees and withdrawal limits; transfer SHIB between funding and trading accounts; view real‑time SHIB market data and historical price charts; place market, limit, and cancel orders on enabled SHIB trading pairs (e.g., SHIB/USD, SHIB/USDC, SHIB/BTC) with correct price and quantity validation; balances and P&L reflect SHIB positions; platform enforces configured risk limits, fees, and KYC/AML checks for SHIB activity; admin tools support enabling/disabling SHIB, viewing on‑chain activity, and executing emergency delisting or wallet freezes. Implementation should include wallet infrastructure, hot/cold key management, monitoring/alerting, reconciliation, QA with testnet/mainnet deposits and withdrawals, and documented launch criteria.