feat(cli): support shell completion (bash/zsh/fish)

[cbingb666]

Feature request

Add shell completion for the kimi CLI (bash, zsh, fish).

Motivation

kimi has a growing set of subcommands (export, provider, acp, web, login, doctor, ...) and many flags (-m/--model, -p/--prompt, --output-format, --skills-dir, --agent, --add-dir, ...). Without completion, users have to remember exact flag names or run kimi --help repeatedly.

Proposal

• Add a kimi completion <shell> command (like gh completion zsh) that prints a completion script for bash / zsh / fish, so users can do e.g.:

  kimi completion zsh > "${fpath[1]}/_kimi"
  # or: echo 'eval "$(kimi completion bash)"' >> ~/.bashrc

• Completion should cover:

  • subcommand names
  • global and per-subcommand flags
  • dynamic values where feasible, e.g. session IDs for --session/export, model aliases for -m/--model (from config.toml), agent profile names for --agent

Environment

• kimi-code version: 0.31.0
• OS: macOS (but this applies to all platforms)

Thanks!