apache/zookeeper ? reverse-engineered prompt

Build me Apache ZooKeeper from this source so I can run it locally and package it properly.

I want the project to compile cleanly, pass the main tests it needs, and produce the runnable release files that include the server jars and docs. If anything is missing or outdated, check the current docs online and update the setup so the build works end to end. After that, make sure I can start a local ZooKeeper instance, connect with the client, and verify the basic coordination features are working.

If there are any obvious issues in the project that stop a normal build or release, please fix them too. Keep the changes minimal and focused on getting a reliable working build and a smooth developer experience.