init: 本地静态页面托管服务

- 初始化

stash-core/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "stash-core"
+version = { workspace = true }
+edition = { workspace = true }
+license = { workspace = true }
+
+[dependencies]
+tokio = { workspace = true }
+tracing = { workspace = true }
+thiserror = { workspace = true }
+anyhow = { workspace = true }
+
+# Web 核心与静态托管
+axum = "0.8.9"
+tower-http = { version = "0.7.1", features = ["fs", "cors", "trace"] }
+tower = { version = "0.4", features = ["util"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+walkdir = "2.4"
+mime_guess = "2.0"