feat: Implement visual experiment designer and enhance landing page

- Add drag-and-drop experiment design capabilities using @dnd-kit libraries
- Introduce new experiment-related database schema and API routes
- Enhance landing page with modern design, gradients, and improved call-to-action sections
- Update app sidebar to include experiments navigation
- Add new dependencies for experiment design and visualization (reactflow, react-zoom-pan-pinch)
- Modify study and experiment schemas to support more flexible experiment configuration
- Implement initial experiment creation and management infrastructure

docker-compose.yml

@@ -15,19 +15,19 @@ services:
       timeout: 5s
       retries: 5
 
-  pgadmin:
-    image: dpage/pgadmin4
-    environment:
-      PGADMIN_DEFAULT_EMAIL: admin@admin.com
-      PGADMIN_DEFAULT_PASSWORD: admin
-      PGADMIN_CONFIG_SERVER_MODE: 'False'
-    ports:
-      - "5050:80"
-    volumes:
-      - pgadmin_data:/var/lib/pgadmin
-    depends_on:
-      db:
-        condition: service_healthy
+  # pgadmin:
+  #   image: dpage/pgadmin4
+  #   environment:
+  #     PGADMIN_DEFAULT_EMAIL: admin@admin.com
+  #     PGADMIN_DEFAULT_PASSWORD: admin
+  #     PGADMIN_CONFIG_SERVER_MODE: 'False'
+  #   ports:
+  #     - "5050:80"
+  #   volumes:
+  #     - pgadmin_data:/var/lib/pgadmin
+  #   depends_on:
+  #     db:
+  #       condition: service_healthy
 
   minio:
     image: minio/minio