feat: add zsh shell completions

[adityabhatkar23]

Summary

#8

Adds Zsh completion support to capcut completions.

Features

• Adds capcut completions zsh

• Completes CLI subcommands

• Completes global flags:

  • --jianying
  • -H / --human
  • -q / --quiet
  • -v / --version

• Adds tests for Zsh completion generation

• Updates documentation

Testing

• Verified completion generation locally
• Verified completion loading and completion behavior in Zsh
• npm test passes
• npm run lint passes

Example

capcut completions zsh > ~/.zsh/completions/_capcut

[renezander030]

Merged — thanks Aditya! Clean refactor and nice parity with the bash one.

Fish next when you're ready, and #8 stays open to track it.

One tiny thing for the docs whenever you touch them again (not blocking): the zsh snippet only loads if ~/.zsh/completions is on fpath before compinit — worth a one-liner so people don't hit silent no-ops.

Rene