chore: 删除 Formatter/Spider 代码及 data/broken 文件夹，更新 CONTRIBUTING

[Copilot]

变更内容

• 删除 src/Formatter：格式化工具（已废弃）
• 删除 src/Spider：爬虫工具（已废弃）
• 删除 data/ 文件夹
• 删除 broken/ 文件夹
• 从 Minecraft-Mod-Language-Package.sln 中移除 Formatter 和 Spider 项目引用
• 更新 CONTRIBUTING.md 仓库结构描述，移除对 Formatter 和 Spider 的说明

[CLAassistant]

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