remove separate ui service, serve ui with backend

Cargo.toml

@@ -0,0 +1,29 @@
+[package]
+name = "nuchat"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+axum = "0.8.4"
+clap = { version = "4.5.41", features = ["derive"] }
+serde = { version = "1.0.219", features = ["derive"] }
+serde_json = "1.0.140"
+tokio = { version = "1.46.1", features = ["full"] }
+tower = { version = "0.5.2", features = ["util"] }
+tower-http = { version = "0.6.6", features = ["fs", "trace"] }
+tracing = "0.1.41"
+tracing-subscriber = { version = "0.3.19", features = ["env-filter"] }
+
+[dev-dependencies]
+reqwest = { version = "0.12.22", features = ["json"] }
+
+[lib]
+path = "src/lib.rs"
+
+[[bin]]
+path  = "src/main.rs"
+name = "nuchat"
+
+# [lints.clippy]
+# missing_errors_doc
+