refactor: 提取 core 库 + 新增 CLI 版本

- 创建 Cargo workspace（core / src-tauri / cli 三 crate）
- core: 纯 Rust 库，零 Tauri 依赖，包含所有业务逻辑
- src-tauri/commands: 改为薄包装，调用 core 函数
- cli: 基于 clap 的命令行工具，支持 JSON 输出
- CLI 命令: list, add, remove, conflicts, scan, profile, check-admin

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src-tauri/Cargo.lock

@@ -2271,7 +2271,7 @@ dependencies = [
 
 [[package]]
 name = "patheditor"
-version = "4.0.0"
+version = "5.0.0"
 dependencies = [
  "chrono",
  "dirs 5.0.1",