[l10n] Improve Russian (ru-RU) locale (#13735)

Signed-off-by: Dmitry <[email protected]>
Co-authored-by: Lukas <[email protected]>

Author: diro-atk

docs/data/data-grid/localization/data.json

@@ -203,7 +203,7 @@
     "languageTag": "ru-RU",
     "importName": "ruRU",
     "localeName": "Russian",
-    "missingKeysCount": 4,
+    "missingKeysCount": 0,
     "totalKeysCount": 118,
     "githubLink": "https://github.com/mui/mui-x/blob/master/packages/x-data-grid/src/locales/ruRU.ts"
   },

packages/x-data-grid/src/locales/ruRU.ts

@@ -63,10 +63,10 @@ const ruRUGrid: Partial<GridLocaleText> = {
   toolbarExportExcel: 'Скачать в формате Excel',
 
   // Columns management text
-  // columnsManagementSearchTitle: 'Search',
-  // columnsManagementNoColumns: 'No columns',
-  // columnsManagementShowHideAllText: 'Show/Hide All',
-  // columnsManagementReset: 'Reset',
+  columnsManagementSearchTitle: 'Поиск',
+  columnsManagementNoColumns: 'Нет столбцов',
+  columnsManagementShowHideAllText: 'Показать/Скрыть Всё',
+  columnsManagementReset: 'Сбросить',
 
   // Filter panel text
   filterPanelAddFilter: 'Добавить фильтр',