[FEATURE] Add functionality to adjust the logging level for `pruna_logger`

[johannaSommer]

✨ What You’ll Do

Right now, our logger is used in the codebase as:

pruna_logger.info("...")
pruna_logger.debug("...")

However, the logging level cannot be easily configured by the user. This makes it harder to control verbosity (for example, if they only want warnings/errors, or if they want more detailed debug output).

You’ll add functionality that lets users adjust the logging level globally, either programmatically or via an environment variable.

🛠️ Dependency

No new dependencies required — Python’s built-in logging module is sufficient.

🤖 Useful Resources

• The pruna_logger instance is already defined and used throughout the codebase.
• A possible reference implementation can be found in the diffusers logger utility.
• You may add a utility function in a module like pruna/logging_utils.py.

➡ Desired Solution

Example usage could look like:

from pruna.logging import set_logging_level

# Option 1: set programmatically
set_logging_level("DEBUG")

# Option 2: set via environment variable
#   export PRUNA_LOG_LEVEL=WARNING

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✅ Acceptance Criteria

• set_logging_level function exists and correctly adjusts the pruna_logger level.
• Supports common logging levels: DEBUG, INFO, WARNING, ERROR, CRITICAL.
• Optional support for configuration via environment variable PRUNA_LOG_LEVEL.
• Users can easily control verbosity of logging output.
• Tests & Docs: All existing and new unit tests pass, and the documentation is updated

And don’t forget to give us a ⭐️!

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❓ Questions?

Feel free to jump into the #contributing Discord channel if you hit any roadblocks. Can’t wait to see your contribution! 🚀

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[rishabh-hub]

Hey @johannaSommer , I'd like to pick this up.

[minettekaum]

@rishabh-hub Cool! If you’re participating in Hacktoberfest, just keep in mind that PRs are eligible starting tomorrow: https://hacktoberfest.com/participation/ :)

[pranayyb]

hey @johannaSommer , I would like to work on this could you assign this issue to me?