Added docstrings for all methods

[sn]

This pull request significantly improves the documentation and docstrings throughout the Nitro Dispatch core, making the codebase much easier to understand and use. It clarifies the purpose and usage of key classes and methods, provides detailed explanations and examples for exceptions, and standardizes the format of docstrings. There are no functional or behavioral changes to the code itself.

The most important changes are:

Documentation and Docstring Improvements:

• nitro_dispatch/core/exceptions.py: Expanded and clarified docstrings for all custom exceptions, explaining their purpose, usage, and context. Added module-level documentation describing the exception hierarchy.
• nitro_dispatch/core/hook_registry.py: Overhauled docstrings for the HookRegistry class and all its methods, providing detailed descriptions, argument/return documentation, and usage examples. Improved module-level documentation. [1] [2] [3] [4] [5] [6] [7] [8]
• nitro_dispatch/core/plugin_base.py: Enhanced class and method docstrings for PluginBase, including a usage example and detailed attribute descriptions. Improved module-level documentation. [1] [2]

Other Minor Changes:

• nitro_dispatch/__init__.py: Bumped the package version to 1.0.2.

No logic or API changes were introduced; all updates are documentation-only for improved clarity and maintainability.