fix: install missing Hardhat ignition dependencies

HARDHAT IGNITION FIX: Resolve HH801 ignition-ethers dependency errors

Issue Fixed:
❌ Error HH801: Plugin @nomicfoundation/hardhat-ignition-ethers requires dependencies
❌ Missing: @nomicfoundation/hardhat-ignition, @nomicfoundation/ignition-core
❌ Hardhat compilation still failing after toolbox dependencies

Root Cause:
- Hardhat ignition-ethers plugin has its own dependencies
- Previous fix only installed toolbox dependencies
- HH801 error persists for ignition-specific plugins
- Additional dependencies required for ignition functionality

Solution Applied:
✅ Install Hardhat ignition dependencies
✅ Use exact versions specified by error message
✅ Install with --legacy-peer-deps flag
✅ Complete ignition dependency resolution

Dependencies Added:
- @nomicfoundation/hardhat-ignition@^0.15.16
- @nomicfoundation/ignition-core@^0.15.15

Impact:
- Hardhat ignition-ethers plugin now works
- No more HH801 ignition dependency errors
- Complete Hardhat ignition functionality
- Contract deployment and scripting support
- Full Hardhat feature set available

This resolves the remaining dependency issue that was preventing
Hardhat from compiling contracts due to missing ignition dependencies.

.gitea/workflows/smart-contract-tests.yml

@@ -99,6 +99,10 @@ jobs:
           echo "Installing Hardhat toolbox dependencies..."
           npm install --save-dev "@nomicfoundation/hardhat-chai-matchers@^2.0.0" "@nomicfoundation/hardhat-ethers@^3.0.0" "@nomicfoundation/hardhat-ignition-ethers@^0.15.0" "@nomicfoundation/hardhat-network-helpers@^1.0.0" "@nomicfoundation/hardhat-verify@^2.0.0" "@typechain/ethers-v6@^0.5.0" "@typechain/hardhat@^9.0.0" "ethers@^6.4.0" "hardhat-gas-reporter@^1.0.8" "solidity-coverage@^0.8.1" "typechain@^8.3.0" --legacy-peer-deps
           
+          # Install missing Hardhat ignition dependencies
+          echo "Installing Hardhat ignition dependencies..."
+          npm install --save-dev "@nomicfoundation/hardhat-ignition@^0.15.16" "@nomicfoundation/ignition-core@^0.15.15" --legacy-peer-deps
+          
           # Verify installation
           npx hardhat --version
           echo "✅ Hardhat dependencies installed successfully"