improve: fixes docs for cli completion cmd

[kimskimchi]

Summary

CLI

To load completions:

Bash:

  $ source <(infra completion bash)

  # To load completions for each session, execute once:
  # Linux:
  $ infra completion bash > /etc/bash_completion.d/infra
  # macOS:
  $ infra completion bash > /usr/local/etc/bash_completion.d/infra

Zsh:

  # If shell completion is not already enabled in your environment,
  # you will need to enable it.  You can execute the following once:

  $ echo "autoload -U compinit; compinit" >> ~/.zshrc

  # To load completions for each session, execute once:
  $ infra completion zsh > "${fpath[1]}/_infra"

  # You will need to start a new shell for this setup to take effect.

fish:

  $ infra completion fish | source

  # To load completions for each session, execute once:
  $ infra completion fish > ~/.config/fish/completions/infra.fish

PowerShell:

  PS> infra completion powershell | Out-String | Invoke-Expression

  # To load completions for every new session, run:
  PS> infra completion powershell > infra.ps1
  # and source this file from your PowerShell profile.

Usage:
  infra completion

Global Flags:
      --help               Display help
      --log-level string   Show logs when running the command [error, warn, info, debug] (default "info")

Docs:

Related Issues

Resolves #2927