Update logging configuration and exclude folder from Ruff analysis

[ecarrenolozano]

This pull request introduces several improvements to configuration management, logging setup, and adds a new usage example for downloaders. The changes mainly focus on enhancing logging granularity, cleaning up YAML and TOML configuration formatting, and providing a new script to demonstrate downloader usage.

Configuration and Logging Enhancements:

• Expanded the logging configuration in 04_workdir.yaml to define multiple loggers (default, pkg_infra, download_manager, ontograph) with specific log levels and handlers, and set up a root logger for overall log control.
• Cleaned up YAML formatting for the ontograph and download_manager integrations in 04_workdir.yaml by standardizing indentation and removing unnecessary quotes.

Development and Linting Tools:

• Updated pyproject.toml to exclude the sandbox/ directory from Ruff linting, helping to keep experimental code separate from production linting checks.

Examples and Usage:

• Added a new script sandbox/use_case_downloaders.py that demonstrates how to set up a session, use the logger, and perform catalog and ontology downloads using the OntoGraph library and its downloader adapter.