Could you please elaborate on whether it's feasible to utilize MetaMask for Starknet? I'm particularly interested in understanding the compatibility and integration of these two platforms. Is there a straightforward process for connecting MetaMask to Starknet? Are there any known challenges or limitations that users might encounter? Additionally, could you provide any insights on the security aspect of using MetaMask on Starknet? I'd appreciate any information that could help me make an informed decision.