- Relocated all bookmarks-related code to a new 'bookmarks' package.
- Updated references from 'neo4j.Bookmarks' to 'bm.Bookmarks' for clarity and to avoid conflicts.
- Adopted 'bm' as a package alias to resolve naming conflicts in functions, like in 'cleanupBookmarks(bookmarks bookmarks.Bookmarks)', to prevent ambiguity.
- Added Bookmarks aliases in the neo4j package to maintain backward compatibility.
- Renamed 'bookmarkManager' to 'DefaultBookmarkManager' for clearer representation and to avoid naming conflicts.

- Relocated all session config
 related code to a new 'bookmarks' package.
- Add AcessMode type to config package
- Add AuthToken  type alias  to config package

- Move SessionConfig Into new file named session_config
- Move AccessMode and its constants into session_config file
- Move AuthToken type alias to session_config file

- Relocated all Transaction Config code into the config package
 and update all references to neo4j.TransactionConfig to config.TransactionConfig

…patibility

- Added all required type aliases to the Neo4j package to ensure backward compatibility.
- This commit introduces SessionConfig, TransactionConfig, and AccessMode aliases in the Neo4j package.