v0.0.22: FrameData — library-agnostic tabular model with pandas/polars/pyarrow conversion

Title: v0.0.22: FrameData — library-agnostic tabular model with pandas/polars/pyarrow conversion

Full Changelog: v0.0.21...v0.0.22

Release notes (https://github.com/walnutgeek/lythonic/blob/main/docs/release_notes/v0.0.22.md)

Design docs:
https://github.com/walnutgeek/lythonic/tree/v0.0.22/docs/superpowers/specs/2026-06-16-frame-data-design.md