CLI entry point. Positional argument order:
node html-lang-patcher.js <filePath> <lang> <langDir> <ogLocale> <enBasename> <langBasename> Copy
node html-lang-patcher.js <filePath> <lang> <langDir> <ogLocale> <enBasename> <langBasename>
process.argv array (or equivalent for testing).
process.argv
CLI entry point. Positional argument order: