Enhance documentation

[otaviojava]

This pull request introduces the new Communication API to Jakarta NoSQL, providing a minimal and extensible foundation for interacting with various NoSQL database models (key-value, document, column, and graph) while preserving native database semantics. The changes include comprehensive documentation updates, new API module exports, and detailed package-level descriptions for each communication model.

Introduction of the Communication API:

• Added the Communication API, which defines a minimal, extensible, and provider-neutral foundation for low-level operations (store, retrieve, replace, remove) across NoSQL databases, with an emphasis on extensibility and preservation of native database semantics. [1] [2] [3] [4]

Documentation and Usage Examples:

• Expanded the README.adoc with detailed explanations and code samples for the key-value, document, column, and graph communication models, illustrating how to interact with each NoSQL paradigm using the new API.
• Updated the changelog to reflect the introduction of the Communication API.

API and Module Enhancements:

• Enhanced the module-info.java to export new communication model packages (document, keyvalue, column, graph) and provided a detailed module-level description of the Communication API’s purpose and design principles.

Package-Level Documentation:

• Added comprehensive JavaDoc to the root communication package and each subpackage, clearly describing the intent, design, and extensibility of the Communication API, with specific focus on the graph communication model. [1] [2]