docs: clarify Node SDK installation and import options

AGENTS.md

@@ -26,3 +26,7 @@
   or a review comment alone as proof of API behavior.
 - Keep the Spanish and English OpenAPI contracts structurally aligned.
 - Run the relevant repository checks for specification changes.
+
+## SDK guide style
+
+- Describe the current SDK as the available version. Keep release announcements out of general guides; version references may explain verified compatibility or when a capability became available. Document import options in the existing installation guide rather than adding a separate SDK article.

website/docs/getting-started/install.mdx

@@ -24,7 +24,7 @@ Empieza por incluir el cliente de Facturapi en las dependencias de tu proyecto.
 Instala el paquete de [NPM](https://www.npmjs.com/package/facturapi).
 
 ```bash
-$> npm install --save facturapi
+$> npm install facturapi
 ```
 
 </TabItem>
@@ -77,16 +77,20 @@ Importa la librería antes de usarla.
 <Tabs groupId="codeExamples">
 <TabItem value="js" label="Node.js" default>
 
-```javascript
-const Facturapi = require('facturapi');
+Elige el import que corresponda a tu proyecto. Con ESM o TypeScript:
+
+```typescript
+import Facturapi from 'facturapi';
 ```
 
-ESM / TypeScript
+Con CommonJS:
 
 ```javascript
-import Facturapi from 'facturapi';
+const Facturapi = require('facturapi');
 ```
 
+El paquete incluye tipos para TypeScript y requiere Node.js 18 o superior. Importa el constructor, los tipos y los enums desde `facturapi`.
+
 </TabItem>
 <TabItem value="cs" label="C#">
 

website/i18n/en/docusaurus-plugin-content-docs/current/getting-started/install.mdx

@@ -24,7 +24,7 @@ Start by including the Facturapi client in your project dependencies.
 Install the package from [NPM](https://www.npmjs.com/package/facturapi).
 
 ```bash
-$> npm install --save facturapi
+$> npm install facturapi
 ```
 
 </TabItem>
@@ -77,16 +77,20 @@ Import the library before using it in your code.
 <Tabs groupId="codeExamples">
 <TabItem value="js" label="Node.js" default>
 
-```javascript
-const Facturapi = require('facturapi');
+Choose the import that matches your project. With ESM or TypeScript:
+
+```typescript
+import Facturapi from 'facturapi';
 ```
 
-ESM / TypeScript
+With CommonJS:
 
 ```javascript
-import Facturapi from 'facturapi';
+const Facturapi = require('facturapi');
 ```
 
+The package includes TypeScript types and requires Node.js 18 or later. Import the constructor, types, and enums from `facturapi`.
+
 </TabItem>
 <TabItem value="cs" label="C#">