refactor(spec,loader): 精简项目结构，移除对json配置的支持

- 优化 spec,loader 部分功能合并到 mirror
- 移除 loader 降级策略逻辑
- 新增 logger.rs 统一日志处理
- 其他优化

Cargo.lock

@@ -162,6 +162,7 @@ dependencies = [
  "anyhow",
  "dunce",
  "mlua",
+ "serde",
  "tinyjson",
  "tracing",
  "tracing-appender",
@@ -325,6 +326,16 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
+[[package]]
+name = "serde"
+version = "1.0.229"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4148590afebada386688f18773da617792bf2ef03ffc1e4cbd2b1d45b023e0ba"
+dependencies = [
+ "serde_core",
+ "serde_derive",
+]
+
 [[package]]
 name = "serde_core"
 version = "1.0.229"