* CLI consistency - use spf13/cobra for main-chef-wrapper

This updates main-chef-wrapper to route commands using cobra
instead of a custom switch/case handler.

This offers a few advantages for upcoming work:

- auto support for shell autocomplete through 'cobra' means we can
  remove that from `chef-cli`, which will greatly increase the startup
  time of the Workstation Powershell on Windows.
- viewing detailed help for any given command is now a fast operation
because we don't have to load ruby VM deps
- it will let us replace and/or expand commands in `chef-cli` in an
isolated fashion, because each command has its own implementation. (Most
implementations current pass through to chef-cli or chef-analyze)

* CLI consistency - use spf13/cobra for main-chef-wrapper

This updates main-chef-wrapper to route commands using cobra
instead of a custom switch/case handler.

This offers a few advantages for upcoming work:

- auto support for shell autocomplete through 'cobra' means we can
  remove that from `chef-cli`, which will greatly increase the startup
  time of the Workstation Powershell on Windows.
- viewing detailed help for any given command is now a fast operation
because we don't have to load ruby VM deps
- it will let us replace and/or expand commands in `chef-cli` in an
isolated fashion, because each command has its own implementation. (Most
implementations current pass through to chef-cli or chef-analyze)


Co-authored-by: Marc A. Paradise <marc.paradise@gmail.com>
Co-authored-by: Mudassar Shafique <15931574+mudash@users.noreply.github.com>
Co-authored-by: Nikhil Gupta <nikhilgupta2102@gmail.com>
Co-authored-by: Nikhil Gupta <ngupta@progress.com>
Co-authored-by: Pranay Singh <i5singh.pranay@gmail.com>