chore(deps): update dependency @stylexjs/stylex to v0.18.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@stylexjs/stylex	0.17.5 → 0.18.1

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Release Notes

facebook/stylex (@​stylexjs/stylex)

v0.18.1

Compare Source

• Add simple sx={} JSX prop syntax as an alternative to stylex.props.
• Fix unplugin generateBundle hook to use emitFile instead of direct bundle assignment.

v0.18.0

Compare Source

• Add stylex.env API for compile-time constants and shareable design tokens.
• New create-stylex-app CLI for scaffolding projects with npx create-stylex-app.
• Add Bun support and improvements to the unplugin bundler plugin.
• Support attribute selectors in stylex.when and conditional styles.
• Fix priority calculation for compound pseudo selectors.

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