Initial commit: CunaFinanceBsc smart contract

- Add upgradeable smart contract with vesting and staking functionality
- Include comprehensive deployment script for proxy deployments and upgrades
- Configure Hardhat with BSC testnet and verification support
- Successfully deployed to BSC testnet at 0x12d705781764b7750d5622727EdA2392b512Ca3d

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.env.example

@@ -0,0 +1,5 @@
+# Private key for deployment (without 0x prefix)
+PRIVATE_KEY=your_private_key_here
+
+# BSC Scan API key for contract verification
+BSCSCAN_API_KEY=your_bscscan_api_key_here