This PR introduces a scalable CLI implementation to manage Permify instances, addressing #146 and #2.

Technical Implementation:

• Built the architecture using spf13/cobra.
• Implemented persistent configuration stored securely in ~/.permify/credentials (YAML format, 0600 permissions, 0700 for the directory).
• Added an interactive configure command to set up Endpoint, API Token, and optional TLS Certificates.
• Integrated automated gRPC client setup, injecting Bearer Tokens and handling TLS configurations natively.

/claim #146 #2

Summary by CodeRabbit

• New Features

  • Added an interactive configuration command to securely collect and store API credentials (endpoint, API token, optional TLS certificates).
  • Automatic credential loading for authenticated connections, with TLS support when certificates are provided.

• Chores

  • Reorganized the application’s CLI entrypoint and command wiring.