refactor: remove figlet and not used code

[sjinks]

This pull request removes all usage of the figlet library and related ASCII art fonts from the CLI output, simplifying message formatting to plain colored text. It also eliminates several features and commands related to secret toggles and release channels, along with the associated code paths and tests. The main goal is to streamline the CLI codebase and reduce dependencies.

Dependency and Feature Removal:

• Removed the figlet dependency from package.json and deleted all code that generated ASCII art using figlet fonts. All stylized text outputs now use plain colored text via chalk. [1] [2]
• Removed all features and CLI options related to secret toggles and release channel management, including their handlers, user configuration updates, and output formatting. [1] [2]

Codebase Simplification:

• Refactored the art.js module to remove the niceFont helper and update all output messages to use simple colored text instead of ASCII art. [1] [2] [3] [4] [5] [6] [7] [8]
• Cleaned up the CLI implementation in cli.js by removing references to secret toggle files and related legacy logic. [1] [2]

Test Cleanup:

• Removed test cases related to the removed makeArt functionality in cli.spec.js.