Added sample showing how to apply stream transformations for events versioning with ESDB

[oskardudycz]

Added sample showing how to apply stream transformations for events versioning with ESDB, see: https://github.com/oskardudycz/EventSourcing.JVM/blob/main/samples/events-versioning/src/test/java/io/eventdriven/eventsversioning/transformations/esdb/StreamTransformationsTests.java

Besides that:

• Added paths to GitHub Actions to trigger only when changes were made to a specific sample folder,
• did a minor cleanup with redundant code in the Events Versioning sample.

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This discussion was created from the release Added sample showing how to apply stream transformations for events versioning with ESDB.