[Docs] Add support for generating Sphinx based documents #546
Description
Describe the enhancement requested
We want to move https://github.com/apache/arrow/tree/apache-arrow-18.1.0/docs/source/java to apache/arrow-java.
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We want to move https://github.com/apache/arrow/tree/apache-arrow-18.1.0/docs/source/java to apache/arrow-java.