Translate directives.md and sidebarReference.json (#846)

Author: NGHdeveloper

src/content/reference/react/directives.md

@@ -1,16 +1,16 @@
 ---
-title: "Directives"
+title: "Directivas"
 ---
 
 <Intro>
 
-React uses two directives to provide instructions to [bundlers compatible with React Server Components](/learn/start-a-new-react-project#bleeding-edge-react-frameworks).
+React utiliza dos directivas para proporcionar instrucciones a [_bundlers_ compatibles con _React Server Components_](/learn/start-a-new-react-project#bleeding-edge-react-frameworks).
 
 </Intro>
 
 ---
 
-## Source code directives {/*source-code-directives*/}
+## Directivas de código fuente {/*source-code-directives*/}
 
-* [`'use client'`](/reference/react/use-client) marks source files whose components execute on the client.
-* [`'use server'`](/reference/react/use-server) marks server-side functions that can be called from client-side code.
+* [`'use client'`](/reference/react/use-client) marca los ficheros fuente cuyos componentes se ejecutan en el cliente.
+* [`'use server'`](/reference/react/use-server) marca funciones del lado del servidor que pueden ser llamadas desde código del lado del cliente.

src/sidebarReference.json

@@ -121,7 +121,7 @@
       ]
     },
     {
-      "title": "Directives",
+      "title": "Directivas",
       "path": "/reference/react/directives",
       "routes": [
         {