Bump version to 1.30.0 (minor bump)

[github-actions]

This PR minor bumps the version to 1.30.0 and updates the changelog.

Reviewer Checklist

Please verify the following before merging:

• Version bump type is appropriate: Confirm that the minor bump matches the nature of changes since the last version:

  • Major: Breaking changes or significant API modifications
  • Minor: New features or functionality additions (backward compatible)
  • Patch: Bug fixes, documentation updates, or minor improvements
  • no bump necessary: Changes only to tests, CI, documentation, or examples.

  If the bump type is not appropriate, close the PR and re-run the workflow with the correct bump type.

• Changelog accuracy: Review that the changelog entries accurately reflect the changes being released, and are understandable to end users.

  If not, edit the changelog before merging.

Next Steps

After merging this PR, trigger a release to publish version 1.30.0.

Changelog (automatically extracted from Unreleased section)

Added

• Added support for translation memories in text translation via
  translation_memory and translation_memory_threshold parameters in
  translate_text().
• Added list_translation_memories() method to the DeepLClient class for
  listing available translation memories.
• Added --translation-memory-id and --translation-memory-threshold CLI
  arguments.

Fixed

• Fixed "gitlab release" CI job to explicitly set the release-cli image, avoiding issues with missing $HOME from the global image.

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This PR was automatically created by the Bump Version workflow