Fix/logging

[belerico]

Summary

This PR standardize the logging of every algorithm, in particular:

• steps_per_second of both environment interaction and training step are computed and synced distributedly thanks to TorchMetrics
• We have introduced the timer class, which can be used both as a context manager and as a decorator to trace time of functions and pieces of code
• We have added a simple tool to print the config at the beginning of the training

Type of Change

Please select the one relevant option below:

• New feature (non-breaking change that adds functionality)

Checklist

Please confirm that the following tasks have been completed:

• I have tested my changes locally and they work as expected. (Please describe the tests you performed.)
• I have added unit tests for my changes, or updated existing tests if necessary.
• I have updated the documentation, if applicable.
• I have installed pre-commit and run locally for my code changes.

Thank you for your contribution! Once you have filled out this template, please ensure that you have assigned the appropriate reviewers and that all tests have passed.