[codemods] Convert shorthands, logical properties & keyframes to StyleX (Emotion→StyleX, 4/6)

[ahmedsadid]

What changed / motivation ?

Part of migrating Emotion styles to StyleX (#1766). Earlier PRs converted static
and conditional styles as written; this one reshapes values that don't map
one-to-one onto StyleX — shorthands, logical properties, and keyframes.

// before
<div css={{ margin: '8px 16px', color: 'navy' }}>Box</div>

// after
const styles = stylex.create({
  box: { marginBlock: '8px', marginInline: '16px', color: 'navy' },
});
<div {...stylex.props(styles.box)}>Box</div>

• Multi-value shorthands (margin: '8px 16px') expand into longhands, since
  StyleX doesn't allow a shorthand and its longhands to coexist.
• Physical properties become logical: marginLeft → marginInlineStart,
  paddingRight → paddingInlineEnd, left → insetInlineStart.
• Emotion keyframes({ … }) becomes stylex.keyframes({ … }), with the import
  and every reference to it updated.
• Refuses two media queries on one property whose order changes the result
  (StyleX would reorder them), plus everything earlier PRs already skipped.

Testing

• Before/after fixtures for margin/padding shorthands, logical properties, and a
  keyframes animation — each result compiles, passes lint, and renders the same
  CSS as the Emotion input.
• One "leave it unchanged" fixture where a single property has two media queries
  whose order decides which one wins — StyleX would reorder them, so the file is
  skipped.
• Unit tests that check each transform on its own — shorthand expansion,
  physical → logical mapping, and keyframes output — by passing style objects
  straight in and asserting the generated StyleX.

Linked PR/Issues

Part of #1766 · builds on #1770

Additional Context

Stacked on #1770, but stands on its own to review.

Pre-flight checklist

• I have read the contributing guidelines
• Performed a self-review of my code

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