Add telemetry

[Copilot]

Telemetry Implementation Plan

• Create telemetry infrastructure
  • Define telemetry level enum (None, Crash, Error, Usage)
  • Create telemetry settings in Settings.cs
  • Create telemetry service interface and implementation
  • Create telemetry event models
• Integrate telemetry into existing code
  • Add telemetry initialization in Entrance.cs
  • Hook into error handling
  • Add usage tracking for key features
• Add telemetry consent to Welcome flow
  • Add telemetry consent step to WelcomeViewModel
  • Create telemetry consent UI
  • Add localization strings for telemetry
• Create privacy policy and data usage documentation
  • Document what data is collected
  • Document how data is used
  • Add privacy policy view
• Add telemetry settings page
  • Add telemetry settings to CommonSettings
  • Create UI for managing telemetry preferences
• Testing and validation
  • Test telemetry collection
  • Verify privacy compliance
  • Test opt-in/opt-out functionality

Original prompt

我需要在项目中添加遥测，匿名收集用户数据（装机量、使用量、错误数据、各版块功能使用情况等），分为不同的level：None, Crash, Error, Usage，用户可以随时开关，首次启动也会提示，并且保证完全合法合规，用户可以对代码进行审计，知道哪些数据被收集，也知道谁能、如何使用这些数据（即一个标准的用户须知）

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