apache/pulsar ? reverse-engineered prompt

I want to get Apache Pulsar building and running locally from this repo, with the quickest setup possible for a new developer.

Please make sure I can start a local broker, run a simple standalone setup, and verify it works by sending and receiving a message with the client. If there are any missing setup steps or confusing parts, clean them up and make the instructions easy to follow. I’d also like the main build and a basic test run to work without extra guesswork.

If you need to check current docs or best practices online, go ahead. Keep the changes practical and focused on a smooth first run, so someone can clone the repo, build it, and see Pulsar working end to end.