Add initial cargo crate

Source/land_of_barl/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "land_of_barl"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+
+[build-dependencies]
+bindgen = "0.71.1"
+
+[lib]
+crate-type = ["staticlib"]

Source/land_of_barl/src/lib.rs

@@ -0,0 +1,14 @@
+pub fn add(left: u64, right: u64) -> u64 {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}