Describe usage of H2 in Java (#2207)

BLI: /home/issues/2453

* H2 is preferred
* Describe gaps and known limitations
* Document how to deal with HANA breakouts
* How to switch to files for Spring dev Tool scenario (how to reset?)
* How to inspect (link to tools)

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Co-authored-by: Rene Jeglinsky <[email protected]>

cds-services-archetype: JDK 25 support (#2118)

Co-authored-by: Mahati Shankar <[email protected]>

August Release with CAP components in v9.3

Merge pull request #130 from cap-js/release

April Release 2023-05-05