Changelog:

• Automate fastest Mozhi instance selection.
• Automatically assign the fastest instance on the first startup instead of selecting it randomly.
• CLI: By default, use the instance from settings.
• CLI: Verify language codes.
• CLI: Do not print empty translations on error.
• CLI: The --help command returns exit code 1.
• Fix language codes for Persian and Chinese Simplified.
• Fix loading of Qt translations.