add semantics crate

crates/semantics/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "folidity-semantics"
+authors.workspace = true
+categories.workspace = true
+edition.workspace = true
+homepage.workspace = true
+keywords.workspace = true
+license.workspace = true
+repository.workspace = true
+version.workspace = true
+
+
+[dependencies]

crates/semantics/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);
+    }
+}