Add capcut-cli

[renezander030]

Adds capcut-cli to Multimedia and File Formats.

capcut-cli is a zero-dependency command-line tool that reads and writes CapCut / JianYing draft_content.json files directly — build and edit video drafts, add subtitles, whisper auto-caption, and cut long-form to shorts, all from the terminal. No server, no private API.

• CLI app, command-line driven (fits the section's "Tools for handling video and audio files.")
• Open source (MIT), actively maintained, >50 stars
• Disclosure: I'm the author — per the guidelines, self-authored CLI apps with 50+ stars are acceptable.

Entry placed alphabetically between Beets and cmus.