Set up machinery

crates/generate/src/lib.rs

@@ -0,0 +1,13 @@
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+use proc_macro2::TokenStream as TokenStream2;
+
+#[proc_macro]
+pub fn from_witx(args: TokenStream) -> TokenStream {
+    TokenStream::new()
+    // TokenStream::from(raw_types::gen(
+    //     TokenStream2::from(args),
+    //     raw_types::Mode::Host,
+    // ))
+}