docs: add integrations guides and sidebar links

Adds new integrations docs for Claude Code, Command Code, and Cursor
Links the Providers pages to the new integrations guide
Updates the docs sidebar with localized integrations navigation

packages/docs/sidebar.config.json

@@ -349,6 +349,21 @@
             "de": "Anbieter, Modelle und Agenten"
           }
         },
+        {
+          "label": "Integrations",
+          "link": "/integrations/",
+          "translations": {
+            "uk": "Інтеграції",
+            "zh-CN": "集成",
+            "es": "Integraciones",
+            "pt-BR": "Integrações",
+            "ko": "통합 기능",
+            "pl": "Integracje",
+            "fr": "Intégrations",
+            "ja": "統合機能",
+            "de": "Integrationen"
+          }
+        },
         {
           "label": "MCP Servers",
           "link": "/mcp/",