!feat: Updated cli parameters

[cilginc]

The issue #5 can be closed after merge.

Please merge this PR first.

Added shell completions and rewrote the handling of completion parameters and flags.

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Hexecute Usage

❯ ./hexecute               
Launch apps by casting spells!

Usage:
  hexecute [command]

Available Commands:
  completion  Get completions for your favorite shell
  help        Help about any command
  learn       Learn a new gesture for the specified command
  list        List all registered gestures
  remove      Remove a gesture by command name
  run         Run the program

Flags:
  -h, --help     Help for hexecute
  -t, --toggle   Help message for toggle

Use "hexecute [command] --help" for more information about a command.

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Completion Command

❯ ./hexecute completion   
Get completions for your favorite shell

Usage:
  hexecute completion [bash|zsh|fish]

Flags:
  -h, --help   Help for completion

Comments on the parameters can still be improved, but this is enough for now.

I will also include shell completions in my AUR package, so users won’t need to explicitly call eval "$(hexecute completion zsh)" in their shell configuration file.