feat(cli): 优化 log 子命令并引入 LogLevel 强类型解析,重构 commands.lua 注册表解析与校验逻辑

- 调整 LogLevel 的 FromStr 错误类型为 String，适配 clap 的 value_parser
- log 子命令直接绑定 LogLevel 枚举，消除硬编码校验与类型转换
- 规范化日志级别更新与配置读取逻辑
- handler 类型有 Function 改为 String

Cargo.toml

@@ -1,16 +1,21 @@
-[package]
-name = "mirror"
+[workspace]
+resolver = "2"
+members = [
+    "mirror-core", "mirror-cli",
+    "mirror-shim",
+]
+
+#[package]
+#name = "mirror"
+
+[workspace.package]
 version = "0.1.0"
 edition = "2024"
 rust-version = "1.94"
 license = "MIT OR Unlicense"
 description = "A fast, safe Rust shim launcher for Scoop"
 
-[profile.release]
-opt-level = "z"
-panic = "abort"
-
-[dependencies]
+[workspace.dependencies]
 anyhow = "1.0.104"
 
 mlua = { version = "0.12.0", features = ["lua54", "vendored","send"] }
@@ -35,7 +40,3 @@ tinyjson="2.5.1"
 #toml = "1.1.4+spec-1.1.0"
 
 
-
-[features]
-default = []
-args=[]