fix: install missing Hardhat toolbox dependencies

HARDHAT DEPENDENCIES FIX: Resolve HH801 plugin dependency errors

Issue Fixed:
❌ Error HH801: Plugin @nomicfoundation/hardhat-toolbox requires dependencies
❌ Missing: @nomicfoundation/hardhat-chai-matchers, hardhat-ethers, ethers, etc.
❌ Hardhat compilation failing due to missing dependencies

Root Cause:
- Hardhat toolbox plugin requires additional dependencies
- package.json only includes base dependencies
- npm install --legacy-peer-deps doesn't install toolbox dependencies
- HH801 error prevents contract compilation

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

Dependencies Added:
- @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

Impact:
- Hardhat compilation now works
- No more HH801 dependency errors
- Complete Hardhat toolbox functionality
- Smart contract tests can run
- Gas reporting and coverage available

This resolves the critical dependency issue that was preventing
Hardhat from compiling and testing smart contracts in the CI/CD environment.

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

@@ -95,6 +95,10 @@ jobs:
           echo "Installing npm dependencies..."
           npm install --legacy-peer-deps
           
+          # Install missing Hardhat toolbox dependencies
+          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
+          
           # Verify installation
           npx hardhat --version
           echo "✅ Hardhat dependencies installed successfully"