fix: optimize-locales-plugin not tree-shaking react-aria and react-stately monopackage

[ashleyryan]

Closes #10109

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

📝 Test Instructions:

We applied the following patch to react-aria and noticed a 60kb improvement:

const fs = require('fs')
const path = require('path')

const pluginPath = path.join(__dirname, '..', 'node_modules', '@react-aria', 'optimize-locales-plugin', 'LocalesPlugin.js')

if (!fs.existsSync(pluginPath)) {
  console.warn('[patch] @react-aria/optimize-locales-plugin not found, skipping patch')
  process.exit(0)
}

const original = '/[/\\\\](@react-stately|@react-aria|@react-spectrum|react-aria-components)[/\\\\]/'
const patched = '/[/\\\\](@react-stately|@react-aria|@react-spectrum|react-aria-components|react-aria|react-stately)[/\\\\]/'

let content = fs.readFileSync(pluginPath, 'utf8')

if (content.includes(patched)) {
  console.log('[patch] @react-aria/optimize-locales-plugin already patched, skipping')
  process.exit(0)
}

if (!content.includes(original)) {
  console.warn('[patch] Expected pattern not found in LocalesPlugin.js — plugin may have been updated. Manual review needed.')
  process.exit(0)
}

content = content.replace(original, patched)
fs.writeFileSync(pluginPath, content, 'utf8')
console.log('[patch] @react-aria/optimize-locales-plugin patched for monopackage path support')

🧢 Your Project:

[snowystinger]

Both react-aria and react-stately have intl directories, so should be included
https://github.com/adobe/react-spectrum/tree/main/packages/react-aria/intl
https://github.com/adobe/react-spectrum/tree/main/packages/react-stately/intl

Thanks for reporting that and fixing it

[snowystinger]

@ashleyryan would you mind signing the CLA? https://github.com/adobe/react-spectrum/blob/main/CONTRIBUTING.md#contributor-license-agreement

[snowystinger]

closing in favor of #10111