Add rest-error-handling.md to translate into Russian

docs/guide-ru/rest-error-handling.md

+Error Handling
+==============
+
+When handling a RESTful API request, if there is an error in the user request or if something unexpected
+happens on the server, you may simply throw an exception to notify the user that something wrong has happened.
+If you can identify the cause of the error (e.g. the requested resource does not exist), you should
+consider throwing an exception with a proper HTTP status code (e.g. [[yii\web\NotFoundHttpException]]
+representing a 404 HTTP status code). Yii will send the response with the corresponding HTTP status
+code and text. It will also include in the response body the serialized representation of the
+exception. For example,
+
+```
+HTTP/1.1 404 Not Found
+Date: Sun, 02 Mar 2014 05:31:43 GMT
+Server: Apache/2.2.26 (Unix) DAV/2 PHP/5.4.20 mod_ssl/2.2.26 OpenSSL/0.9.8y
+Transfer-Encoding: chunked
+Content-Type: application/json; charset=UTF-8
+
+{
+    "type": "yii\\web\\NotFoundHttpException",
+    "name": "Not Found Exception",
+    "message": "The requested resource was not found.",
+    "code": 0,
+    "status": 404
+}
+```
+
+The following list summarizes the HTTP status code that are used by the Yii REST framework:
+
+* `200`: OK. Everything worked as expected.
+* `201`: A resource was successfully created in response to a `POST` request. The `Location` header
+   contains the URL pointing to the newly created resource.
+* `204`: The request is handled successfully and the response contains no body content (like a `DELETE` request).
+* `304`: Resource was not modified. You can use the cached version.
+* `400`: Bad request. This could be caused by various reasons from the user side, such as invalid JSON
+   data in the request body, invalid action parameters, etc.
+* `401`: Authentication failed.
+* `403`: The authenticated user is not allowed to access the specified API endpoint.
+* `404`: The requested resource does not exist.
+* `405`: Method not allowed. Please check the `Allow` header for allowed HTTP methods.
+* `415`: Unsupported media type. The requested content type or version number is invalid.
+* `422`: Data validation failed (in response to a `POST` request, for example). Please check the response body for detailed error messages.
+* `429`: Too many requests. The request is rejected due to rate limiting.
+* `500`: Internal server error. This could be caused by internal program errors.