Copilot instructions

1### Multilingual Support in QuickLook
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3**QuickLook Core Application (QL Main Program):**
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5- QuickLook implements multilingual support using separate XML files for each supported language.
6- All UI strings, messages, and text displayed by QuickLook are stored in these XML language files.
7- When adding a new feature, all supported language files must be updated; every string key must be translated in every language’s XML. Missing translations are not allowed.
8- On startup, QuickLook loads the language file corresponding to the user’s system locale, ensuring a consistent and complete localized UI.
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10**QuickLook Plugins:**
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12- Plugins also implement localization using XML language files, following the same structure and requirements as the main program.
13- Each plugin must maintain its own language files for every supported language, covering all displayed UI strings and messages.
14- Any addition of new strings or features in a plugin requires translating every string into all supported languages and updating the XML files accordingly.
15- The plugin loads the appropriate XML language file at runtime based on the system or QuickLook's selected language.
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17**Important Note:**
18When implementing or updating multilingual support in QuickLook or its plugins, **all supported languages must be present and fully localized in the XML files**. Partial or missing translations are not permitted.