fix(macos): add actual language placeholder files

[laosb]

So Xcode will correctly generate language list.

Summary by Sourcery

Bug Fixes:

• Add language placeholder files for 'en', 'ja', 'lzh', and 'zh-Hans' to ensure Xcode correctly generates the language list.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR adds localization support for the macOS app by introducing Info.plist files for multiple languages (English, Japanese, Literary Chinese, and Simplified Chinese) in their respective .lproj directories. This ensures Xcode correctly generates the language list for the application.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Added localization support through Info.plist files for multiple languages	Created identical Info.plist files in language-specific .lproj directories Included standard macOS app configuration with bundle settings Set app category as 'public.app-category.music' Configured non-exempt encryption flag as false	macos/Runner/en.lproj/Info.plist macos/Runner/ja.lproj/Info.plist macos/Runner/lzh.lproj/Info.plist macos/Runner/zh-Hans.lproj/Info.plist

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[sourcery-ai]

Hey @laosb - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider using 'zh-Hant' (Traditional Chinese) instead of 'lzh' (Literary Chinese) as the latter is rarely used in modern applications

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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