Made the necessary changes as requested by sebs

[Heyuplol-101]

✅ What changed

• Upgraded project tooling:
  • hardhat.config.js → hardhat.config.ts
  • Added Hardhat EDR profiles + networks + dotenv config variables
  • Added tsconfig.json
• Upgraded dependencies:
  • Hardhat v3, Hardhat Ignition, Hardhat Toolbox Viem, TypeScript, Viem
  • OpenZeppelin v5.4.0
• Added Ignition deployment module:
  • ignition/modules/LendingPool.ts
• Updated scripts for consistent local/testnet demos:
  • scripts/demo.js
  • scripts/demo-testnet.js
• Synced docs and metadata:
  • README.md, UPDATES.md, SECURITY.MD, package.json
• Kept existing features intact (contracts and business logic remained consistent with current boilerplate flow).

🔍 Verification

• npm install works
• hardhat compile passes
• hardhat test runs without failures

Why

This ensures the boilerplate repo is using the updated production/modern stack from the canonical version while preserving existing contract behavior.