Function generate_mnemonic 

pub fn generate_mnemonic(
    word_count: Option<WordCount>,
    language: Option<Language>,
) -> Result<String, DerivationError>

Generates a new BIP39 mnemonic phrase using a specified word count.

Arguments

• word_count - Optional number of words for the mnemonic (default: 12 words)
• language - Optional language for the mnemonic words (default: English)

Returns

• Result<String, DerivationError> - A new mnemonic phrase or an error

Errors

• DerivationError::Bip39Error - If mnemonic generation fails