Merge the C++, Python and Format documentation and move it to the top-level folder. **Reporter**: [Uwe Korn](https://issues.apache.org/jira/browse/ARROW-3834) / @xhochy **Assignee**: [Uwe Korn](https://issues.apache.org/jira/browse/ARROW-3834) / @xhochy #### Related issues: - [[C++] Row-wise conversion tutorial has fallen out of date](https://github.com/apache/arrow/issues/19789) (Blocked) #### PRs and other links: - [GitHub Pull Request #2856](https://github.com/apache/arrow/pull/2856) <sub>**Note**: *This issue was originally created as [ARROW-3834](https://issues.apache.org/jira/browse/ARROW-3834). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*</sub>
Merge the C++, Python and Format documentation and move it to the top-level folder.
Reporter: Uwe Korn / @xhochy
Assignee: Uwe Korn / @xhochy
Related issues:
PRs and other links:
Note: This issue was originally created as ARROW-3834. Please see the migration documentation for further details.