lib/cli.zsh (944 lines) and lib/diagnostics.zsh (353 lines) were parsed
on every startup to define functions that most shells never call. Move
them to $ZSH/functions/, which is already on $fpath, and autoload the
two entry points from oh-my-zsh.sh instead. The `omz` completion moves
to $ZSH/completions/_omz where compinit picks it up on its own.
Measured on macOS arm64, zsh 5.9: ~1.7 ms less per interactive start.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
