[Bug]: Issue with Building PLC4X Project - Looking for Kafka Integration JAR

### What happened?

Hello,

I am a beginner with Maven and PLC4X, and I need help with building the PLC4X project and locating a specific JAR file.

I have downloaded the plc4x-0.12.0 folder and run mvn clean install from the command line. The build process completes without errors, but in the target folder, I only see files like failsafe-reports, maven-shared-archive-resources, .plxarc, and plc4x-parent-0.12.0-site, among others. I cannot find the expected JAR file, such as the plc4j-apache-kafka-0.12.0-uber-jar, which I am looking for.

I am unsure if I have used the correct pom.xml file. Should I be running the build in a different directory, or is there something missing in the configuration of the project?

Any help would be greatly appreciated.

Thank you!

### Version

plc4x-0.12.0

### Programming Languages

- [x] plc4j
- [ ] plc4go
- [ ] plc4c
- [ ] plc4net

### Protocols

- [ ] AB-Ethernet
- [ ] ADS /AMS
- [ ] BACnet/IP
- [ ] CANopen
- [ ] DeltaV
- [ ] DF1
- [ ] EtherNet/IP
- [ ] Firmata
- [ ] KNXnet/IP
- [ ] Modbus
- [ ] OPC-UA
- [ ] S7

Start by checking the pom.xml used with mvn clean install and compare the target folder contents with the expected plc4j-apache-kafka-0.12.0-uber-jar. Confirm whether the build directory and configuration produce that JAR, and document the correct command or location when the artifact can be found.

Written by the indexing model from the issue text.