Add browse and package commands to CLI tool

[albertospelta]

This PR introduces new experimental commands to the CLI tool, enhancing its capabilities for working with VPAX package files.

The following commands have been added:

• browse enables users to explore and browse metadata of a tabular model contained within a VPAX package file
  • model display tabular model information
  • table display tables information
  • column display columns information
  • relationship display relationships information
• package provides tools to manage and manipulate VPAX package files
  • extract extract all files from a VPAX package
  • set set a VPAX file to be the current active package
  • show show details of a VPAX package file
  • unset unset the current VPAX package file