Oudated list of default libraries #2292
Description
While helping out someone on the forum (https://community.openhab.org/t/java-library-for-json-generation/155742), I have referenced to our list of default libraries inside the coding guidelines of the docs (https://next.openhab.org/docs/developer/guidelines.html#default-libraries).
However it seems that this list is outdated, e.g. Jackson which is used in openhab-core is not listed at all.
Git blame (https://github.com/openhab/openhab-docs/blame/main/developers/guidelines.md#L331) shows that the last update is years ago.
https://github.com/holgerfriedrich/openhab-core/blob/main/features/karaf/openhab-tp/src/main/feature/feature.xml probably is a good starting point to have a look at the dependencies.
This issue is related to #974.
Pinging @openhab/maintainers and especially @openhab/core-maintainers since we need to make sure these docs are up-to-date again.