docs: add useError composable (#8912)

docs/3.api/1.composables/use-error.md

@@ -1,12 +1,37 @@
+---
+title: "useError"
+description: useError composable returns the global Nuxt error that is being handled.
+---
+
 # `useError`
 
-This function will return the global Nuxt error that is being handled.
+`useError` composable returns the global Nuxt error that is being handled and it is available on both client and server.
 
 ```ts
 const error = useError()
 ```
 
-`useError` sets an error in the state and creates a reactive and SSR-friendly global Nuxt error across components.
+`useError` sets an error in the state and creates a reactive as well as SSR-friendly global Nuxt error across components. Nuxt errors have the following properties:
+
+## Properties
+
+- **statusCode**
+
+  Type: `Number`
+
+  HTTP response status code
+
+- **statusMessage**
+
+  Type: `String`
+
+  HTTP response status message
+
+- **message**
+
+  Type: `String`
+
+  Error message
 
 ::ReadMore{link="/docs/getting-started/error-handling"}
 ::