Allow creating miden accounts with a previous seed phrase

Some people like to import seed phrase that they use on other chains (ethereum, bitcoin) and use the same seed phrase here, it should be simple to cater to these kind of people but I would warn that we will not guarantee the entropy of this seed phrase and then create the account

Look for account creation logic in the wallet codebase, likely in a service or module handling seed phrases. Understand how current seed generation works and where to add an import path. Check for existing tests on account creation to extend. The feature is done when a user can input an external seed phrase and a Miden account is created with a warning about entropy.

Written by the indexing model from the issue text.