Voxtral Realtime: font color option

[manuelcandales]

This pull request adds support for colored output in the voxtral_realtime example, allowing users to specify the color of the output text via a new command-line flag. The implementation replaces the previous hardcoded color logic with a more flexible approach and provides error handling for invalid color values.

New feature: Output text color customization

• Added a --color command-line flag to main.cpp, allowing users to choose between green, red, or no color for output text.
• Implemented logic to parse the --color flag, set the appropriate ANSI color code, and handle invalid values with an error message and exit.
• Updated the output printing logic to use the selected color dynamically instead of a hardcoded value, and to reset the color after each token.

[pytorch-bot]

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❌ 1 New Failure, 88 Pending

As of commit 9e0e842 with merge base 5a9b280 ():

NEW FAILURE - The following job has failed:

• Build Presets / windows (windows) / build (gh)

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[Copilot]

Pull request overview

This PR adds a command-line flag to customize the output text color in the voxtral_realtime example. The implementation allows users to choose between green, red, or no color for the transcribed text output.

Changes:

• Added --color command-line flag that accepts "green", "red", or empty string (no color)
• Replaced hardcoded use_color boolean with dynamic ansi_color pointer-based approach
• Implemented input validation with clear error messages for invalid color values

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