Results 1 comments of malatrax

Related to #82 Adding a flag for custom class hashes when using `starkli account fetch`, bypassing the [`KNOWN_ACCOUNT_CLASSES`](https://github.com/xJonathanLEI/starkli/blob/f59724e10cdd069e4b6c0b18ad131f3c6a7f6cca/src/account.rs#L23) array would be a great workaround in between updating the array.