fix(compiler): expand var()-valued border-inline shorthands to start/end

[YevheniiKotyrlo]

Completes #379

#379 maps the logical-border longhands to their RN start/end props via propertyRename (border-inline-start-color → borderStartColor, …). The shorthands border-inline-color / border-inline-width take a different path when they're var()-valued: the parsed parseBorderInline* never runs (the value is a runtime variable), so they fall through to parseUnparsedDeclaration — where propertyRename only covers the longhands. The shorthand is therefore never expanded to start/end and silently drops on native (RN has no border-inline-*).

Concretely: border-x / border-y composed from a runtime variable (border-inline-color: var(--x)) renders nothing, while the explicit-value form #379 already handles works.

Fix

Expand the two logical-border shorthands to their RTL-aware start/end props inside parseUnparsedDeclaration, sharing the single runtime value — exactly what parseBorderInline* does on the parsed path:

const inlineShorthandExpansion: Record<string, string[]> = {
  "border-inline-color": ["border-start-color", "border-end-color"],
  "border-inline-width": ["border-start-width", "border-end-width"],
};

// in parseUnparsedDeclaration, before the runtime-shorthand handling:
const shorthandExpansion = inlineShorthandExpansion[property];
if (shorthandExpansion) {
  const value = parseUnparsed(declaration.value.value, builder, property);
  for (const target of shorthandExpansion) {
    builder.descriptorProperty = target;
    builder.addDescriptor(target, value);
  }
  return;
}

border-inline-style stays out — RN has no borderStartStyle / borderEndStyle to map it to (it's already in the unsupported set).

Test plan

New cases in src/__tests__/compiler/logical-borders.test.ts: a var()-valued border-inline-color and border-inline-width each expand to both start and end descriptors sharing the resolved value. Verified against #379's built branch — this branch is stacked on fix-logical-border-props, so the diff here is only the completion (+24 logic / +33 tests).

yarn test, yarn typecheck, yarn eslint, and prettier --check pass; lefthook-clean.

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Stacked on your fix-logical-border-props branch so this shows only the delta. Merge it into #379, cherry-pick the commit, or tell me to retarget — whatever's easiest for you.