Expose `autotickangles` for Cartesian and polar radial axes in the core F# API. Include tests and documentation for its use with automatic tick angles. [Release notes](https://github.com/plotly/plotly.js/releases/tag/v2.29.0) · [Upstream implementation PR #6790](https://github.com/plotly/plotly.js/pull/6790).
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