Forward Gmail messages to new recipients with optional notes and attachments.

• Requires a Gmail message ID and one or more recipient addresses; supports CC, BCC, and sender aliases
• Allows optional plain-text or HTML message bodies to precede the forwarded content, plus multiple file attachments
• Preserves original message metadata (sender, date, subject, recipients) in the forwarded block using Gmail's standard quote formatting
• Includes dry-run mode to preview the request before sending