chore(release): bump version to v2.39.3

[jpyzio123]

Summary

• prepare the 2.39.3 patch release after the remaining AC-4477 dependency updates
• bump @livechat/design-system-icons and @livechat/design-system-react-components from 2.39.2 to 2.39.3
• update internal workspace dependency ranges and lockfile metadata

Verification

• npm run prepare-release
  • lint passed
  • 517 tests passed
  • production builds passed
• npm run deploy:dry-run
  • @livechat/design-system-icons@2.39.3
  • @livechat/design-system-react-components@2.39.3

Related: AC-4477

[Copilot]

🟢 Approval recommended

All release versions and internal dependency references are consistently updated to v2.39.3.

Pull request overview

Prepares the coordinated v2.39.3 patch release and aligns internal workspace dependencies and lockfile metadata.

Changes:

• Bumps icons and React components to v2.39.3.
• Updates example app dependency ranges.
• Synchronizes Lerna and lockfile versions.

File summaries

File	Description
packages/react-components/package.json	Bumps package and icons dependency versions.
packages/icons/package.json	Bumps the icons package version.
packages/example-react/package.json	Updates app and design-system dependency versions.
package-lock.json	Synchronizes workspace version metadata.
lerna.json	Sets the monorepo release version.

Review details

• Files reviewed: 4/5 changed files
• Comments generated: 0
• Review effort level: Balanced

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