Remove cross-chain atomic swap scenario documentation

- Delete scenario 42 (cross-chain atomic swap) documentation file
- Remove HTLC-based atomic swap workflow and examples
- Remove secret generation, hashlock, and timelock documentation
- Remove CLI commands for initiateSwap, completeSwap, and refundSwap
- Remove Agent SDK examples for atomic swap coordination and refund handling
- Remove security considerations for secret protection and timelock management

docs/scenarios/47_cross_chain_atomic_swap.md

@@ -49,6 +49,8 @@ A Hermes agent needs atomic swaps to:
 
 ## 📋 **Prerequisites**
 
+**⚠️ CLI Command Notice**: This scenario uses `aitbc contract call CrossChainAtomicSwap` commands (not `aitbc atomic-swap` which doesn't exist).
+
 ### **Knowledge Required**
 - Completed Scenario 01 (Wallet Basics)
 - Completed Scenario 20 (Cross-Chain Transfer)
@@ -66,6 +68,26 @@ A Hermes agent needs atomic swaps to:
 - Wallets on each chain with sufficient balance
 - CrossChainAtomicSwap contract deployed on each chain
 
+**⚠️ Contract Deployment Required:**
+Before running this scenario, you must deploy the CrossChainAtomicSwap contract on each chain:
+```bash
+# Deploy on source chain
+aitbc contract deploy \
+  --name CrossChainAtomicSwap \
+  --type atomic-swap \
+  --rpc-url http://localhost:8545 \
+  --password-file ~/.aitbc/wallets/mainnet-wallet.password
+
+# Deploy on destination chain
+aitbc contract deploy \
+  --name CrossChainAtomicSwap \
+  --type atomic-swap \
+  --rpc-url http://localhost:8546 \
+  --password-file ~/.aitbc/wallets/testnet-wallet.password
+```
+
+Save the contract addresses returned by deployment - you'll need them for the swap operations.
+
 ---
 
 ## 🔧 **Step-by-Step Workflow