Add game of life

Cargo.toml

@@ -1,5 +1,6 @@
 [workspace]
 resolver = "2"
 members = [
-    "checkerboard"
+    "checkerboard",
+    "game-of-life",
 ]

game-of-life/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "game-of-life"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

game-of-life/src/lib.rs

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