feat(mail): add --reply-to-message-id to drafts create

[okuegow]

What

Adds a --reply-to-message-id <id> flag to mog mail drafts create.

When set, the draft is created as a threaded reply via Graph's createReply action (which keeps the quoted original and conversation threading) and is left in the Drafts folder for review instead of being sent. This complements the existing mail send --reply-to-message-id, which sends immediately — the new flag is for the "draft, review, then send" workflow.

Behaviour

• --to / --subject become optional. Recipients default to the original sender (filled in by createReply) and are only overridden when --to/--cc/--bcc are supplied.
• Also adds --cc / --bcc to mail drafts create for the non-reply case (previously unavailable).
• The user's --body/--body-file text is passed as the createReply comment so it lands above the quoted original.
• If setting recipients fails after the draft exists, deletion of the half-built draft is attempted and the deletion outcome is reported in the error — so the message never claims the draft was "removed" when it actually remains.
• --body-file read errors are now wrapped consistently with mail send.

Tests

TestMailDraftsCreateCmd_Reply covers: createReply is used and the draft is never sent; the user text rides along as the comment; recipients are patched only when supplied (otherwise the original sender is kept); createReply API errors surface; a response without an id is an error; and a recipient-patch failure deletes the orphaned draft.

Notes

• Self-contained against main (no dependency on the other open PRs).
• Attachment support on reply drafts is a trivial follow-up once feat(mail): add --attachment to send, drafts create and replies #13 (the --attachment flag) lands.

[okuegow]

Hi @visionik — hope you're well, and thanks for mog, it's become a daily driver for me.

I know mogcli is a side project, so no pressure, but I've got three small, self-contained, tested PRs sitting open that I'd love to get in:

• fix(mail): avoid $orderby together with $search (Graph rejects it) #12 — fix(mail): avoid $orderby together with $search. This one's an actual bug: right now every multi-word mail search 400s with SearchWithOrderBy, so search is effectively broken for any real query.
• feat(mail): add --attachment to send, drafts create and replies #13 — feat(mail): --attachment for send/drafts/replies.
• feat(mail): add --reply-to-message-id to drafts create #15 — feat(mail): --reply-to-message-id for drafts create (threaded reply drafts, review-then-send).

All three are green and mergeable. Happy to squash them into a single PR if that's easier to review — just say the word.

And if it'd take maintenance off your plate: I'm glad to help co-maintain / triage the mog side. Either way, no rush — just flagging that they're ready whenever you have a minute. 🙏