feat: add i18n support for 5 languages (en, es, fr, de, zh)

cortex/i18n/__init__.py

@@ -0,0 +1,58 @@
+"""
+Internationalization (i18n) module for Cortex Linux CLI.
+
+Provides multi-language support with:
+- Message translation with interpolation
+- OS language auto-detection
+- Language preference persistence
+- Locale-aware date/time and number formatting
+
+Usage:
+    from cortex.i18n import t, get_translator, set_language, get_language
+
+    # Simple translation
+    print(t("install.success"))
+
+    # Translation with variables
+    print(t("install.package_installed", package="docker", version="24.0.5"))
+
+    # Change language
+    set_language("es")
+
+Supported languages:
+    - en: English (default)
+    - es: Spanish
+    - fr: French
+    - de: German
+    - zh: Chinese (Simplified)
+"""
+
+from cortex.i18n.config import LanguageConfig
+from cortex.i18n.detector import detect_os_language
+from cortex.i18n.formatter import LocaleFormatter
+from cortex.i18n.translator import (
+    SUPPORTED_LANGUAGES,
+    get_language,
+    get_language_info,
+    get_supported_languages,
+    get_translator,
+    set_language,
+    t,
+)
+
+__all__ = [
+    # Core translation
+    "t",
+    "get_translator",
+    "set_language",
+    "get_language",
+    "get_language_info",
+    "get_supported_languages",
+    "SUPPORTED_LANGUAGES",
+    # Configuration
+    "LanguageConfig",
+    # Detection
+    "detect_os_language",
+    # Formatting
+    "LocaleFormatter",
+]