feat: support translation key format resource pack desc

[pynickle]

支持对 translation key 格式简介的资源包解析：

"description": {
    "translate": "sodium.resource_pack.unofficial",
    "fallback": "Unofficial translations for Sodium"
}

[Glavo]

/gemini review

[gemini-code-assist]

Code Review

This pull request implements localized description resolution for resource packs and refactors locale mapping to align with Minecraft's language tagging. Key updates include the introduction of ResourcepackDescriptionResolver to handle translated metadata, enhancements to LocaleUtils for identifying Minecraft-specific language files, and the propagation of locale information through the resource pack loading process. Review feedback recommends specifying UTF-8 encoding for metadata files to ensure cross-platform compatibility, optimizing loops by hoisting invariant calculations, and utilizing input streams for JSON parsing to improve memory efficiency.