* Created spring-ai-commons module that contains the document classes and Media
* Created spring-ai-document-ingestion containing ETL related classes
* Created spring-ai-chat-document-transformer module containing transformers that utilitze the ChatModel
Started to refactor package names for document ETL classes to have 'document' in their package name.
This commit introduces a new Markdown document reader with several
key features and improvements:
* Add support for text with various formatting elements
* Implement handling for horizontal rules and hard line breaks
* Add functionality for inline and block code sections
* Incorporate blockquote handling
* Support ordered and unordered lists
* Introduce additional metadata capabilities
* Include JavaDocs
Update ETL documentation to reflect these new features and usage.
Fixes#105
