Improve module management

[BSick7]

Overview

The following improvements would greatly help module development.

• Add toggle for public/private module to UI
• Allow user to select repo when creating new module in UI
• Use current repository when creating new module via CLI
• Specify "include" globs in module manifest; use them when packaging module
• Provide something like nullstone apply --publish that will publish the current module and apply in Nullstone
• nullstone workspaces select uses the declared tool to initialize (terraform init, tofu init, etc.)
• nullstone modules generate asks the user which tool to use and configures in .nullstone/module.yml