[FEATURE] Add Chinese (Simplified) localization for context menus in VSCode extension

Request

Please add Chinese (Simplified) localization support for the right-click context menu in the VSCode extension.

Current Behavior

Even when VSCode is set to Chinese (简体中文), Claude Code's right-click context menu and other UI elements remain in English.

Expected Behavior

Claude Code UI should follow the VSCode display language setting, or at least provide a way to switch to Chinese (Simplified).

Why

• VSCode has a large Chinese-speaking developer community
• The VSCode Chinese Language Pack is widely used
• Other VSCode extensions already support display language auto-detection

Environment

• OS: Windows 11
• VSCode with Chinese (Simplified) Language Pack installed
• Claude Code extension (latest)