feat: add blave-quant skill

[Blave-Wei]

Summary

• Adds blave-quant skill covering Blave alpha market data, BitMart Futures, BitMart Spot, and OKX trading
• Includes indicator interpretation guide (references/blave-indicator-guide.md) with stat field meanings and combined analysis recommendations
• Includes OKX API reference (references/okx-api-reference.md) with broker code enforcement and ctVal query directive for swap contract sizing
• Added to marketplace.json under Trading category

Skill Capabilities

1. Blave Market Alpha Data — 9 indicators (Holder Concentration, Taker Intensity, Whale Hunter, Squeeze Momentum, Market Direction, Capital Shortage, Sector Rotation, Top Trader Exposure, Market Sentiment) + kline + alpha_table screening
2. BitMart Futures — 53 endpoints, open/close positions, leverage, TP/SL, plan orders, trailing stops, sub-account transfers
3. BitMart Spot — 34 endpoints, buy/sell, limit/market orders, balance, order history
4. OKX Trading — spot and perpetual swaps, broker tag enforcement on all order POSTs

Test plan

• Load skill and verify Blave alpha data queries work
• Verify BitMart futures order flow (CONFIRM gate before execution)
• Verify OKX spot and swap order flow with broker tag
• Verify unsupported exchange fallback behavior

🤖 Generated with Claude Code

[vercel]

@Blave-Wei is attempting to deploy a commit to the init1's projects Team on Vercel.

A member of the Team first needs to authorize it.