feat: add Hardhat support with examples for Counter & UniversalCounter on Push Chai

[Kali-Decoder]

📌 Summary

This PR introduces Hardhat support for smart contract developers building on Push Chain. It includes example contracts, deployment scripts, and test suites for both a basic counter and a universal cross-chain counter.

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What’s Added

• 🧱 Hardhat Support Folder

  • Added a dedicated setup for Hardhat-based smart contract development
  • Simplifies onboarding for developers using Hardhat

• 📄 Example Contracts

  • Counter → basic increment counter
  • UniversalCounter → multi-chain counter using UEA (Sepolia, Push)

• 🚀 Deployment Scripts

  • Added scripts to deploy contracts on Push Chain Donut Testnet
  • Supports seamless contract deployment for both examples

• 🧪 Test Scripts

  • Added unit tests for:
    • Counter
    • UniversalCounter
  • Covers:
    • Deployment validation
    • Increment logic
    • Multi-user interaction
    • Chain-based logic (for UniversalCounter)

🛠 How to Use

# Install dependencies
npm install

# Run tests
npx hardhat test

# Deploy (Push Testnet)
npx hardhat run scripts/deployCounter.ts --network pushTestnet


@pranshurastogi  @mohammeds1992  

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