refactor: add new logger without a global state

[mrexox]

Context

Current internal/log implementation is kinda mess. Need to change the app to have injectable logger instead of a global logger + state and colors management.

Also move all printing-related logic into the logger package.

Changes

• Add a logger.Logger type
• Dynamically detect colors on/off based on ENV variables
• Upgrade lipgloss package
• Drop old log package and replace all the calls with logger.Logger
• Add (and fix) tests