💥 (init): Change command interface

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% wk init -h

Usage:   wk init
Version: unknown

Description:

  Render the widget for zsh.

Options:

  -h, --help                - Show this help.                                                                       
  --leader        <KEY>     - Key to trigger the wk.                                                                
  --major-leader  <KEY>     - Key to trigger the wk major-prefix menu.                                              
  --major-prefix  <PREFIX>  - Prefix used for entries shown when major-leader is pressed.             (Default: "m")
  --bind-global             - Bind leader and major-leader even when the prompt buffer is not empty.                

Examples:

  eval "$(wk init)"                                                    Register the which-key widget without any key bindings.        
  eval "$(wk init --leader '^G')"                                      Bind the Ctrl+G as the leader key.                             
  eval "$(wk init --leader ' ' --major-leader ',' --major-prefix 'm')" Bind space as the leader key and comma as the major-leader key.
                                                                       The major-prefix "m" is used for the major menu.