fix(miden-bank): avoid deposit namespace collision

[bars26]

Summary

Renames the Miden Bank account method from deposit() to bank_deposit() to avoid the namespace collision with the deposit note component.

Changes

• Renamed the Bank::deposit() method to Bank::bank_deposit()
• Updated the bank account implementation
• Updated the deposit-note cross-component call
• Updated all related Miden Bank tutorial documentation and diagrams
• Kept withdraw() unchanged

This makes the bank account method explicit while avoiding the deposit namespace collision between components.