[cfg] refactor: Use omegaconf structured configuration system

[acat-rw]

What does this PR do?

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• Add OmegaConf dependencies and define structured configuration data classes
• Added config module, including configuration schema, loader, and utility functions
• Migration of CLI parameters from --arg format to key=value format
• Add preset YAML configuration files for timeline and GMM scenarios
• Update all components (parser, visualizer, pipeline) to use the new configuration system
• Modify tests, sample scripts, and documentation to adapt to the new configuration format
• Remove old CLI parameter registration functions and simplify module initialization

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[gemini-code-assist]

Code Review

This pull request migrates the project's configuration and CLI argument handling from argparse to a structured system based on OmegaConf. It introduces dataclass-based schemas, YAML presets, and a new key=value CLI format, with corresponding updates across documentation, example scripts, and the test suite. Review feedback identifies a potential AttributeError when rendering help for complex type hints and notes that mandatory field validation is currently unreachable due to OmegaConf's internal error handling. Additionally, there are suggestions to use more idiomatic OmegaConf methods for configuration retrieval and to decouple visualizer selection logic to improve long-term maintainability.

[tardis-key]

#48