add bindings and fix documentation

bindings/node/binding.cc

@@ -0,0 +1,19 @@
+#include <napi.h>
+
+typedef struct TSLanguage TSLanguage;
+
+extern "C" TSLanguage *tree_sitter_django();
+
+// "tree-sitter", "language" hashed with BLAKE2
+const napi_type_tag LANGUAGE_TYPE_TAG = {
+    0x8AF2E5212AD58ABF, 0xD5006CAD83ABBA16
+};
+
+Napi::Object Init(Napi::Env env, Napi::Object exports) {
+    auto language = Napi::External<TSLanguage>::New(env, tree_sitter_django());
+    language.TypeTag(&LANGUAGE_TYPE_TAG);
+    exports["language"] = language;
+    return exports;
+}
+
+NODE_API_MODULE(tree_sitter_django_binding, Init)