Add PasswordPolicy

[eonist]

public struct PasswordPolicy {
    public let minLength: Int
    public let maxLength: Int
    public let requireUppercase: Bool
    public let requireLowercase: Bool
    public let requireNumbers: Bool
    public let requireSymbols: Bool
    public let prohibitedSequences: [String]
    // Additional rules as needed
}

public func generatePassword(with policy: PasswordPolicy) throws -> String {
    // Implement password generation logic based on the policy
    // ...
    return password
}