Move Jackson Support Classes Into Separate Modules

[ChristianLohmann]

This pull request introduces two new modules, logbook-json-common and logbook-json-jackson2, to modularize and share JSON-related functionality. It updates dependencies and refactors code to use these new modules, improving maintainability and preparing for support of multiple JSON implementations.

Module introduction and dependency updates:

• Added new Maven modules: logbook-json-common (for shared JSON utilities) and logbook-json-jackson2 (for Jackson 2-specific JSON handling). [1] [2]
• Updated logbook-bom/pom.xml and logbook-jmh/pom.xml to include dependencies on the new modules. [1] [2]

Code refactoring for new modules:

• Moved common JSON utility classes from logbook-json to logbook-json-common and updated imports accordingly. [1] [2] [3] [4] [5] [6]
• Refactored benchmark code in HttpLogFormatterState to use FastJsonHttpLogFormatterJackson2 instead of the previous FastJsonHttpLogFormatter, aligning with the new modular structure. [1] [2]
• Updated usage of JsonPathBodyFilters in benchmarks to reference the correct class after modularization.

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All commits are signed

[kasmarian]

I think it's also worth updating README and explaining how/when to use each of the modules.

[kasmarian]

This catch doesn't make sense any more as it's now trying to initialize a class, that's not in the classpath. Before it was used to fallback to jackson2, as this is a static method.