init workspace with root package

.gitignore

@@ -0,0 +1 @@
+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "uf-library"
+version = "0.1.0"

Cargo.toml

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+[workspace]
+
+[package]
+name = "uf-library"
+version = "0.1.0"
+edition = "2021"

src/main.rs

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+fn main() {
+    println!("Hello, world!");
+}