Update dependencies and refactor application structure

- Updated various dependencies in `Cargo.toml` to their latest versions, including `tonic`, `tokio`, and `url`.
- Refactored `ServerConfig` to include a new `grpc_target` field, replacing the previous bind and port fields.
- Removed the `routes.rs` file and integrated its functionality into the main application logic.
- Enhanced the `PrinterInfo` struct to include additional fields for printer details.
- Simplified the main application flow by directly using the `ControlService` for handling requests.
- Cleaned up unused code and improved overall organization of the project structure.

build.rs

@@ -0,0 +1,12 @@
+fn main() {
+    let protoc = protoc_bin_vendored::protoc_bin_path().expect("failed to fetch protoc");
+    unsafe {
+        std::env::set_var("PROTOC", protoc);
+    }
+
+    tonic_build::configure()
+        .build_server(false)
+        .compile(&["proto/control.proto"], &["proto"])
+        .expect("failed to compile protobuf");
+}
+