docs: short-form content production checklist

[2sem]

Goal

Create a repeatable checklist for producing and publishing short-form promo content for TalkTrans.

Scope

• Cover theme selection, capture, editing, captioning, publishing, and post tracking
• Keep the workflow simple enough to run repeatedly with low overhead
• Align example content with the product's travel and translation use cases

Acceptance Criteria

• The checklist is concrete and reusable
• It supports publishing across short-form channels with minimal extra work
• It is aligned with TalkTrans positioning and current product features

Why

Short-form marketing needs a repeatable operating system, not one-off ideas.