feat: Add LibreTranslate self-hosted translation service

- Add LibreTranslate service with 50+ language support
- Configure with Basic Auth for security
- Integrate with wizard and final report
- Add documentation to README

.env.example

@@ -119,6 +119,14 @@ LANGFUSE_INIT_USER_PASSWORD=
 COMFYUI_USERNAME=
 COMFYUI_PASSWORD=
 
+############
+# [required]
+# LibreTranslate credentials (for Caddy basic auth)
+############
+LIBRETRANSLATE_USERNAME=
+LIBRETRANSLATE_PASSWORD=
+LIBRETRANSLATE_PASSWORD_HASH=
+
 ############
 # [required for prod]
 # Caddy Config
@@ -150,6 +158,7 @@ QDRANT_HOSTNAME=qdrant.yourdomain.com
 PADDLEOCR_HOSTNAME=paddleocr.yourdomain.com
 COMFYUI_HOSTNAME=comfyui.yourdomain.com
 RAGAPP_HOSTNAME=ragapp.yourdomain.com
+LIBRETRANSLATE_HOSTNAME=translate.yourdomain.com
 LETSENCRYPT_EMAIL=
 
 # Everything below this point is optional.
@@ -180,6 +189,19 @@ RAGAPP_PASSWORD=
  #####
    #
 
+############
+# LibreTranslate Configuration (optional)
+############
+LIBRETRANSLATE_CHAR_LIMIT=10000
+LIBRETRANSLATE_DEFAULT_SOURCE=auto
+LIBRETRANSLATE_DEFAULT_TARGET=en
+LIBRETRANSLATE_API_KEYS=false
+LIBRETRANSLATE_THREADS=4
+LIBRETRANSLATE_SUGGESTIONS=false
+LIBRETRANSLATE_DISABLE_WEB_UI=false
+LIBRETRANSLATE_UPDATE_MODELS=false
+LIBRETRANSLATE_METRICS=false
+
 ############
 # Optional Google Authentication for Supabase
 # Get these values from the Google Admin Console