Changes

• Move NameFormat to core, since it is a more general concept @987Nabil (#834)
• Additional JsonCodec configurations (#831) @987Nabil (#832)
• Independent en-/decoding of empty collections & options for JSON (#829) @987Nabil (#830)
• Avro Codec decoding for GenericRecord Single field is now supported @harshtech123 (#823)
• Update avro to 1.12.0 @plokhotnyuk (#828)
• Update README.md @github-actions (#827)
• Update dependencies @plokhotnyuk (#826)