Challenge: Explore the Account Model

Create a function that builds a mock Solana account structure. This will help you understand the key properties every account has.

Requirements

• Create a function that accepts owner (PublicKey), lamports (number), data (Uint8Array), and executable (boolean)
• Return an object representing an account with these properties
• The object should also include a publicKey (generate a new one) and rentEpoch (set to 0 for this mock)