chore: make folder names match crate name

crates/aiken-project/src/options.rs

@@ -0,0 +1,12 @@
+pub struct Options {
+    pub code_gen_mode: CodeGenMode,
+}
+
+pub enum CodeGenMode {
+    Test {
+        match_tests: Option<String>,
+        verbose: bool,
+    },
+    Build(bool),
+    NoOp,
+}