feat: add full Russian language support; update Readme.md files, and .gitignore update (#514)

* feat: add Russian locale

- Add ru translations and register namespaces

- Add Russian to supported languages list

- Ignore .gemini workspace config

* fix: improve Russian plural forms in sidebar translations

Add proper Russian plural forms (few/many) for correct grammar with different count values

* docs(readme): add Russian translation and fix language switcher order

- Create README.ru.md based on the current English README.
- Update language switchers in all localized README files so
    English comes first, Russian second, and the remaining
    languages follow.
- Fix the issue where the current language was not shown
    correctly in the switcher for some localized README files

* fix(readme): fix language switcher positions and markdown issues

- Fix language switcher positions in README.md.
- Add bash language tags to command code blocks in README.ru.md.

* fix(readme): fix tool setup step numbering

- Fix tool setup step numbering in README.md and localized README files.

* fix(gitignore): allow translation task files to be tracked

Add exceptions to .gitignore for task translation files across multiple locales
(en, ja, ru, ko, zh-CN) to enable version control of translated content while
keeping generated task files ignored.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

* feat(i18n): add Russian translation for tasks

Add Russian locale translation file for TaskMaster task management interface.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

* fix: ignore missing tasks.json files for ko and zh-cn locales

* Delete .worktrees directory

---------

Co-authored-by: Claude Haiku 4.5 <noreply@anthropic.com>

src/i18n/config.js

@@ -49,6 +49,15 @@ import jaCodeEditor from './locales/ja/codeEditor.json';
 // eslint-disable-next-line import-x/order
 import jaTasks from './locales/ja/tasks.json';
 
+import ruCommon from './locales/ru/common.json';
+import ruSettings from './locales/ru/settings.json';
+import ruAuth from './locales/ru/auth.json';
+import ruSidebar from './locales/ru/sidebar.json';
+import ruChat from './locales/ru/chat.json';
+import ruCodeEditor from './locales/ru/codeEditor.json';
+// eslint-disable-next-line import-x/order
+import ruTasks from './locales/ru/tasks.json';
+
 // Import supported languages configuration
 import { languages } from './languages.js';
 
@@ -107,6 +116,15 @@ i18n
         codeEditor: jaCodeEditor,
         tasks: jaTasks,
       },
+      ru: {
+        common: ruCommon,
+        settings: ruSettings,
+        auth: ruAuth,
+        sidebar: ruSidebar,
+        chat: ruChat,
+        codeEditor: ruCodeEditor,
+        tasks: ruTasks,
+      },
     },
 
     // Default language