chore: init lang crate

Cargo.lock

@@ -11,6 +11,10 @@ dependencies = [
  "uplc",
 ]
 
+[[package]]
+name = "aiken-lang"
+version = "0.0.0"
+
 [[package]]
 name = "anyhow"
 version = "1.0.57"

Cargo.toml

@@ -1,2 +1,2 @@
 [workspace]
-members = ["crates/cli", "crates/flat", "crates/uplc"]
+members = ["crates/*"]

crates/lang/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "aiken-lang"
+version = "0.0.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

crates/lang/src/lib.rs

@@ -0,0 +1,8 @@
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        let result = 2 + 2;
+        assert_eq!(result, 4);
+    }
+}