Add OpenAI API integration and update translations

- Introduced `enable_openai_api` option in config.yaml to enable OpenAI-compatible Chat Completions endpoint.
- Updated `apply_gateway_settings` function to handle OpenAI API settings.
- Enhanced documentation in DOCS.md for integrating OpenClaw with Home Assistant Assist pipeline.
- Added translations for `enable_openai_api` in English, Bulgarian, German, Spanish, and Polish.
- Bumped version to 0.5.37 in config.yaml.

openclaw_assistant/translations/bg.yaml

@@ -51,6 +51,10 @@ configuration:
     name: Порт на Gateway
     description: Номер на порт, на който OpenClaw gateway да слуша (по подразбиране - 18789)
   
+  enable_openai_api:
+    name: Активиране на OpenAI API
+    description: Активиране на OpenAI-съвместим Chat Completions ендпойнт. Позволява използването на OpenClaw като разговорен агент в HA Assist pipeline чрез Extended OpenAI Conversation (HACS) или всеки OpenAI-съвместим клиент.
+  
   allow_insecure_auth:
     name: Разрешаване на HTTP автентикация
     description: Разрешаване на HTTP автентикация за достъп до gateway в локалната мрежа. ВНИМАНИЕ - Активирайте само ако използвате HTTP (не HTTPS) за gateway_public_url. Необходимо за достъп от браузър през HTTP.

openclaw_assistant/translations/de.yaml

@@ -51,6 +51,10 @@ configuration:
     name: Gateway-Port
     description: Portnummer, auf der das OpenClaw-Gateway lauscht (Standard - 18789)
   
+  enable_openai_api:
+    name: OpenAI API aktivieren
+    description: OpenAI-kompatiblen Chat Completions Endpunkt aktivieren. Ermöglicht die Verwendung von OpenClaw als Gesprächsagent in der HA Assist Pipeline über Extended OpenAI Conversation (HACS) oder jeden OpenAI-kompatiblen Client.
+  
   allow_insecure_auth:
     name: Unsichere HTTP-Authentifizierung erlauben
     description: HTTP-Authentifizierung für Gateway-Zugriff im LAN erlauben. WARNUNG - Nur aktivieren, wenn HTTP (nicht HTTPS) für gateway_public_url verwendet wird. Erforderlich für Browser-Zugriff über HTTP.

openclaw_assistant/translations/en.yaml

@@ -51,6 +51,10 @@ configuration:
     name: Gateway Port
     description: Port number for the OpenClaw gateway to listen on (default - 18789)
   
+  enable_openai_api:
+    name: Enable OpenAI API
+    description: Enable OpenAI-compatible Chat Completions endpoint. Allows using OpenClaw as a conversation agent in HA Assist pipeline via Extended OpenAI Conversation (HACS) or any OpenAI-compatible client.
+  
   allow_insecure_auth:
     name: Allow Insecure HTTP Auth
     description: Allow HTTP authentication for gateway access on LAN. WARNING - Only enable if using HTTP (not HTTPS) for gateway_public_url. Required for browser access over HTTP.

openclaw_assistant/translations/es.yaml

@@ -51,6 +51,10 @@ configuration:
     name: Puerto del Gateway
     description: Número de puerto en el que el gateway de OpenClaw escuchará (predeterminado - 18789)
   
+  enable_openai_api:
+    name: Activar API OpenAI
+    description: Activar endpoint de Chat Completions compatible con OpenAI. Permite usar OpenClaw como agente de conversación en HA Assist pipeline mediante Extended OpenAI Conversation (HACS) o cualquier cliente compatible con OpenAI.
+  
   allow_insecure_auth:
     name: Permitir autenticación HTTP insegura
     description: Permitir autenticación HTTP para acceso al gateway en LAN. ADVERTENCIA - Solo habilitar si usa HTTP (no HTTPS) para gateway_public_url. Requerido para acceso desde navegador por HTTP.

openclaw_assistant/translations/pl.yaml

@@ -47,6 +47,10 @@ configuration:
     name: Port Gateway
     description: Numer portu na którym gateway OpenClaw będzie nasłuchiwał (domyślnie - 18789)
   
+  enable_openai_api:
+    name: Włącz API OpenAI
+    description: Włącz endpoint Chat Completions kompatybilny z OpenAI. Pozwala używać OpenClaw jako agenta konwersacji w HA Assist pipeline przez Extended OpenAI Conversation (HACS) lub dowolnego klienta kompatybilnego z OpenAI.
+  
   allow_insecure_auth:
     name: Zezwól na niezabezpieczone uwierzytelnianie HTTP
     description: Zezwól na uwierzytelnianie HTTP dla dostępu do gateway w sieci LAN. UWAGA - Włącz tylko jeśli używasz HTTP (nie HTTPS) dla gateway_public_url. Wymagane dla dostępu przez przeglądarkę przez HTTP.