feat(derive): add Action derive macro

crate/bevy_controls_derive/src/lib.rs

@@ -0,0 +1,7 @@
+extern crate proc_macro;
+use proc_macro::TokenStream;
+
+#[proc_macro_derive(Action)]
+pub fn action(_input: TokenStream) -> TokenStream {
+  todo!("urmom")
+}