feat(components): [el-notification] add context for notification (#6368)

- Add context for notify method
- Add documentation for adding appContext for notification
- Fix a bug which message[type] method connot get context
- Enhance documentation for ElMessage

docs/en-US/component/notification.md

@@ -83,7 +83,7 @@ import { ElNotification } from 'element-plus'
 
 In this case you should call `ElNotification(options)`. We have also registered methods for different types, e.g. `ElNotification.success(options)`. You can call `ElNotification.closeAll()` to manually close all the instances.
 
-## App context inheritance <el-tag>> 2.0.2</el-tag>
+## App context inheritance <el-tag>> 2.0.4</el-tag>
 
 Now notification accepts a `context` as second parameter of the message constructor which allows you to inject current app's context to notification which allows you to inherit all the properties of the app.
 

packages/components/message/src/message-method.ts

@@ -130,16 +130,19 @@ const message: MessageFn & Partial<Message> & { _context: AppContext | null } =
   }
 
 messageTypes.forEach((type) => {
-  message[type] = (options = {}) => {
+  message[type] = (options = {}, appContext?: AppContext | null) => {
     if (isString(options) || isVNode(options)) {
       options = {
         message: options,
       }
     }
-    return message({
-      ...options,
-      type,
-    })
+    return message(
+      {
+        ...options,
+        type,
+      },
+      appContext
+    )
   }
 })