chore: 提升TFM兼容性并新增VSCode配置迁移脚本

[joesdu]

📝 描述 (Description)

本次提交主要内容如下：

• EasilyNET.Core.Benchmark.csproj 仅支持 net11.0。
• EasilyNET.Test.Unit.csproj 支持 net10.0 与 net11.0 多目标框架。
• 新增 sync-vscode-insiders-to-cursor.ps1 脚本，实现 VSCode Insiders 到 Cursor 的用户配置与扩展同步，支持 WhatIf 预览及详细日志。
• 提升测试与基准项目的 .NET 版本兼容性，增强开发环境迁移便利性。

🔗 相关问题 (Related Issues)

• Closes #
• Fixes #

🏷️ 变更类型 (Type of Change)

• 🐛 错误修复 (Bug fix) (non-breaking change which fixes an issue)
• ✨ 新功能 (New feature) (non-breaking change which adds functionality)
• 💥 破坏性变更 (Breaking change) (fix or feature that would cause existing functionality to not work as expected)
• 📚 文档更新 (Documentation update)
• 🔧 重构 (Refactor) (no functional changes)
• 🧪 测试 (Tests) (adding or updating tests)
• 🛠️ 构建/CI 变更 (Build/CI changes)
• 🎨 样式变更 (Style changes) (formatting, etc.)
• 🚀 性能改进 (Performance improvements)
• 🔒 安全改进 (Security improvements)

✅ 检查清单 (Checklist)

• 我的代码遵循项目的编码标准 (My code follows the project's coding standards)
• 我已经对自己的代码进行了自我审查 (I have performed a self-review of my own code)
• 我已经在难以理解的区域注释了我的代码 (I have commented my code, particularly in hard-to-understand areas)
• 我已经对文档进行了相应的更改 (I have made corresponding changes to the documentation)
• 我的更改不会产生新的警告或错误 (My changes generate no new warnings or errors)
• 我已经添加了证明我的修复有效或我的功能工作的测试 (I have added tests that prove my fix is effective or that my feature works)
• 新增和现有的单元测试在本地通过我的更改 (New and existing unit tests pass locally with my changes)
• 任何依赖变更都已合并并发布到下游模块 (Any dependent changes have been merged and published in downstream modules)

🧪 测试 (Testing)

• 单元测试 (Unit tests)
• 集成测试 (Integration tests)
• 手动测试 (Manual testing)
• 其他 (请指定) (Other (please specify)):

📸 截图 (如果适用) (Screenshots (if applicable))

🔍 附加说明 (Additional Notes)

[Copilot]

Pull request overview

This PR removes the entire EasilyNET.Core.Benchmark benchmark project (and its solution reference), removes the outdated test/AGENTS.md, updates AGENTS.md to reflect the removal, strips a BOM from the test project file, and adds a new PowerShell script for syncing VS Code Insiders settings/extensions to Cursor.

Changes:

• Removed the EasilyNET.Core.Benchmark project and all its files, including the solution reference.
• Removed test/AGENTS.md (which contained incorrect testing framework info) and updated root AGENTS.md.
• Added sync-vscode-insiders-to-cursor.ps1 for developer environment migration.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
EasilyNET.slnx	Removed benchmark project reference from solution
AGENTS.md	Updated to remove "benchmarks" from test directory description
test/AGENTS.md	Deleted (contained outdated/incorrect info)
test/EasilyNET.Core.Benchmark/*	All benchmark files deleted
test/EasilyNET.Test.Unit/EasilyNET.Test.Unit.csproj	Removed BOM character from first line
sync-vscode-insiders-to-cursor.ps1	New script for syncing VS Code Insiders config to Cursor

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