Refine body of water parsing and discovery

[matchews]

Summary

• expand the body-of-water configuration to expose metadata such as name, type, spillover settings, and equipment lists
• remove duplicate equipment lists from the backyard configuration and surface nested devices through the body-of-water entries
• update discovery logic and unit tests to consume the new structure and verify body-of-water properties

Testing

• mvn -pl bundles/org.openhab.binding.haywardomnilogiclocal -am test (fails: unable to resolve parent POM while offline)

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https://chatgpt.com/codex/tasks/task_e_68c8af24fe408323babb6d4d20d75070