Function validateBankAccount

validateBankAccount(
    acc: unknown,
    bankCode?: unknown,
    branchCode?: unknown,
): ValidationResult<
    { account: string; bank?: BankInfo; branchCode?: string },
>
Validates a bank account number returning detailed ValidationResult.
Parameters
- acc: unknown
  Account number. Spaces and hyphens are ignored.
- OptionalbankCode: unknown
  Optional CBSL bank code to validate and include.
- OptionalbranchCode: unknown
  Optional three-digit branch code to validate and include.
Returns ValidationResult<{ account: string; bank?: BankInfo; branchCode?: string }>
{ isValid: true, data } with the account, bank, and branch, or { isValid: false, error, errors, code }.
Example
```
validateBankAccount('1234567890', '7010').isValid; // true
validateBankAccount('1234567890', '0000').code; // 'BANK_CODE_INVALID'
```
- Defined in bank/validator.ts:137