13437: Type hints and doc strings: Conda.core.subdir_data

[Nathann03]

conda#13821

• Description: This task entails refining type hints and documenting functionalities in the Conda.core.subdir_data module of the Conda package. Clear and accurate type hints aid in code maintenance and reduce the likelihood of type-related bugs. Detailed docstrings improve code understanding, especially for developers new to the Conda codebase.
• Risk Assessment: Our group faces the risk of interdependence among modules within Conda, where changes in Conda.core.subdir_data may impact other modules. To mitigate this risk, we will carefully review code dependencies, conduct thorough testing of affected areas, and maintain clear communication channels within our group to coordinate changes and ensure compatibility across modules.