Create a file for interacting with blockchain functions like `getBalance` and `getCurrentBlock`

Add a new JavaScript file (e.g., blockchainInfo.js) that interacts directly with the blockchain using Ethers.js. The file should include basic read-only functions such as:

• getBalance(address) → Returns the ETH balance of a given address
• getCurrentBlock() → Returns the current block number

Suggestions:

• Use ethers.providers.JsonRpcProvider() for connection
• Display the results clearly in the console
• Handle errors gracefully