feat: add a histrical wit-bindgen

__wasm/wit-bindgen-sample/wit-bindgen/crates/wit-bindgen-demo/demo.wit

@@ -0,0 +1,29 @@
+type files = list<tuple<string, string>>
+
+variant wasmtime-async {
+  all,
+  none,
+  only(list<string>),
+}
+
+enum lang {
+  js,
+  rust,
+  wasmtime,
+  wasmtime-py,
+  c,
+  markdown,
+  spidermonkey,
+}
+
+
+resource config {
+  static new: func() -> config
+
+  render: func(lang: lang, wit: string, import: bool) -> expected<files, string>
+
+  set-rust-unchecked: func(unchecked: bool)
+  set-wasmtime-tracing: func(unchecked: bool)
+  set-wasmtime-async: func(val: wasmtime-async)
+  set-wasmtime-custom-error: func(custom: bool)
+}