Docs: Add initial documentation

[izzet]

This pull request introduces significant updates to the DFAnalyzer project, focusing on documentation enhancements, configuration improvements, and codebase adjustments. The changes include the addition of Sphinx-based documentation, updates to configuration parameters, and a new README with detailed installation and usage instructions.

Documentation Enhancements:

• Added a Sphinx configuration file (docs/conf.py) and a minimal Makefile for building documentation, enabling the use of the Read the Docs platform. [1] [2]
• Created a detailed configuration.rst file documenting all configuration parameters, analyzers, output options, and cluster configurations.
• Introduced a .readthedocs.yaml file to define the Read the Docs build environment, specifying Python 3.12 and Sphinx settings.

Configuration Updates:

• Updated the default checkpoint directory in AnalyzerConfig from ${hydra:runtime.output_dir} to ${hydra:run.dir} for consistency with Hydra's runtime directory structure.
• Removed the default value for time_granularity in the Config class, making it optional.

README Overhaul:

• Replaced the placeholder README with a comprehensive guide, including an overview of DFAnalyzer, installation instructions, usage examples, and links to resources such as documentation and contribution guidelines.