Function handle_init 

pub fn handle_init(
    cmd: InitCommand,
    ctx: &CliConfig,
    now: DateTime<Utc>,
) -> Result<()>

Handle the init command with Gather → Execute → Display pattern.

Args:

• cmd: Parsed InitCommand from the CLI.
• ctx: CLI configuration with passphrase provider and repo path.

Usage:

handle_init(cmd, &ctx)?;